Category

Calculators

Financial, health, math, date and everyday calculators that run entirely in the browser.

64 tools

How to use these Calculators

Calculators is a set of 64 free online tools. Financial, health, math, date and everyday calculators that run entirely in the browser. Each link below opens a page with the form, a short explanation of the inputs, and answers to the questions people ask before they rely on a result.

Start with the name that matches the job: BMI Calculator, Percentage Calculator, Age Calculator, Loan Calculator, Mortgage Calculator, Compound Interest Calculator, Tip Calculator, Discount Calculator, Sales Tax Calculator, Calorie Calculator, BMR Calculator, TDEE Calculator, Body Fat Calculator, Ideal Weight Calculator, plus 50 more in this same list. Read the description under the name. If it describes the number, file, or text you already have, open that tool and enter those values. The result stays on the page so you can change one input and compare.

Browser tools run on your device and do not need an account. Where a tool sends work to a server, the page says so next to the form. Treat every result as an estimate you can check: units, rates, and file settings are only as accurate as what you type in.

BMI CalculatorCalculate Body Mass Index from height and weight in metric or imperial units.Percentage CalculatorFind percentages, percentage change, and what percent one number is of another.Age CalculatorCompute exact age in years, months, weeks, and days from a date of birth.Loan CalculatorEstimate monthly payments, total interest, and payoff for any loan.Mortgage CalculatorEstimate full monthly PITI — principal, interest, taxes, insurance, HOA, and PMI — and compare 15-year vs 30-year cost.Compound Interest CalculatorProject investment growth with compounding over time and contributions.Tip CalculatorCalculate tip amount and split the total bill among multiple people.Discount CalculatorFind sale price and amount saved from an original price and discount percent.Sales Tax CalculatorAdd sales tax to a price or extract tax from a gross amount.Calorie CalculatorEstimate daily calorie needs for maintenance, loss, or gain.BMR CalculatorCalculate Basal Metabolic Rate to estimate resting calorie burn.TDEE CalculatorCompute Total Daily Energy Expenditure from BMR and activity level.Body Fat CalculatorEstimate body fat percentage using the US Navy method measurements.Ideal Weight CalculatorSuggest a healthy weight range based on height, age, and gender.Due Date CalculatorEstimate a pregnancy due date from the last menstrual period.Ovulation CalculatorPredict fertile windows and ovulation days from cycle data.Pregnancy CalculatorTrack pregnancy progress, week count, and key milestones.GPA CalculatorCompute grade point average from course grades and credit hours.Grade CalculatorCalculate final or weighted grades and the score needed to pass.Fraction CalculatorAdd, subtract, multiply, and simplify fractions.Scientific CalculatorFull-function calculator with trig, logs, exponents, and constants.Date CalculatorAdd or subtract days from a date and find the span between two dates.Hours CalculatorCalculate total hours and minutes between two times for timesheets.Time Duration CalculatorMeasure elapsed time between two date-times in multiple units.Countdown CalculatorCount down the days, hours, and minutes until any target date.Paycheck CalculatorEstimate take-home pay after taxes and common deductions.Salary CalculatorConvert pay between hourly, weekly, monthly, and annual rates.Sleep CalculatorSuggest bedtimes or wake times based on 90-minute sleep cycles.Random Number GeneratorGenerate random numbers within a custom range with options.Standard Deviation CalculatorCompute mean, variance, and standard deviation for a data set.Zakat CalculatorCalculate Zakat on gold, silver and wealth in your browser.Afghan Date ConverterConvert Shamsi (Solar Hijri) dates to Gregorian and back.Tasbih CounterDigital Tasbih counter for dhikr and Islamic remembrance.Salary Tax CalculatorEstimate income tax and net salary from gross pay.EMI CalculatorCalculate monthly EMI, total interest, and payment for home, car, or personal loans.VAT / GST CalculatorAdd or extract VAT and GST from any amount with a custom tax rate.Profit Margin CalculatorCalculate profit, profit margin %, and markup from cost and selling price.Debt Payoff CalculatorCompare snowball vs avalanche debt payoff plans with months, interest, and a payment schedule.Inflation CalculatorSee what today’s money will be worth later — or was worth in the past — using a custom inflation rate.SIP CalculatorEstimate mutual fund SIP maturity value, total invested, and returns — with optional annual step-up.CAGR CalculatorCalculate compound annual growth rate from beginning value, ending value, and years.FD CalculatorCalculate fixed deposit maturity amount and interest with monthly, quarterly, or yearly compounding.PPF CalculatorEstimate Public Provident Fund maturity, total invested, and interest with yearly contributions and compounding.SWP CalculatorEstimate Systematic Withdrawal Plan results — total withdrawn, returns earned, and remaining corpus from monthly withdrawals.RD CalculatorCalculate recurring deposit maturity amount and interest from monthly installments, rate, and tenure — with quarterly compounding or simple interest.Lumpsum CalculatorEstimate mutual fund lumpsum maturity value, total invested, and returns from a one-time investment, expected return, and tenure.EPF CalculatorEstimate Employee Provident Fund maturity, total contributions, and interest from basic salary, contribution rates, and years of service.NPS CalculatorEstimate National Pension System corpus at retirement from monthly contributions, expected return, tenure, and optional step-up — with lump-sum vs annuity split.Gratuity CalculatorEstimate gratuity payout from last drawn salary and years of service using the Payment of Gratuity Act (÷26) or private (÷30) formula — with half-year rounding.HRA CalculatorEstimate House Rent Allowance (HRA) tax exemption under Section 10(13A) — the minimum of actual HRA, rent minus 10% of salary, and 40%/50% metro rule.SSY CalculatorEstimate Sukanya Samriddhi Yojana maturity, total invested, and interest — deposits for up to 15 years, compounding through the full 21-year account tenure.SCSS CalculatorEstimate Senior Citizen Savings Scheme quarterly interest, total interest over tenure, and principal returned at maturity from a lump-sum deposit.NSC CalculatorEstimate National Savings Certificate maturity amount and interest from a lump-sum deposit, notified rate, and tenure — with annual compounding.ROI CalculatorCalculate return on investment (ROI %), net profit, and annualized ROI from cost and gain or final value — with optional holding period.XIRR CalculatorCalculate annualized XIRR from irregular dated cash flows — investments, SIPs with gaps, and redemptions — Excel-compatible planning math in your browser.Concrete CalculatorEstimate slab or column concrete in cubic yards, cubic meters, and 60 or 80 lb bags, with waste and bag cost.Paint CalculatorCalculate wall and ceiling paint gallons from room size, doors, windows, coats, and coverage.Gravel CalculatorConvert driveway or path area and depth into cubic yards, tons, and material cost for gravel, sand, or mulch.Square Footage CalculatorFind area in square feet and square meters for rectangles, circles, triangles, and trapezoids.Fuel Cost CalculatorEstimate trip fuel gallons, cost per person, and savings between two MPG ratings.Credit Card Payoff CalculatorSee months to pay off a credit card, total interest, and how much an extra monthly payment saves.Debt-to-Income CalculatorCalculate front-end and back-end debt-to-income ratios from gross income, housing, and other debts.Home Affordability CalculatorEstimate a maximum home price from income, debts, down payment, rate, and tax-and-insurance allowance.APR CalculatorCompare note interest rate with APR after upfront loan fees, plus the monthly payment.

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AI-Powered Tools Handwriting OCR Freelancer Tools DevOps Tools Health & Fitness Text Tools Developer Tools Security & Password Tools PDF Tools Image Tools Color Tools Unit Converters SEO & Web Tools Social Media Tools Content Creator Tools Converters & Generators Home & Trade Calculators

How to use 542+ tools on this site

Each tool is a separate page. The title is the task, the sentence under the title is the scope, and the form is the product. Type the text, choose the file, or enter the numbers you already have. The result stays on that page. You can change one field and compare a second case without starting over.

480 tools run in the browser. The file or the figures stay on your device, which is why those pages are marked private. They work without an account. AI writers and handwriting OCR send the input to a server so a model can run, and the page says so. The free plan includes a small daily limit for those server tools. Pro removes the limit. Do not paste passwords or account numbers into a server tool.

Search from the header when you know the tool name. Open a category when you only know the kind of job. Calculator pages are estimates: a payment, a yard of concrete, or a calorie figure is only as good as the rate, the unit, and the date you typed. PDF and image pages follow the file you upload. If the page never mentions a rule that applies to your bank, school, clinic, or city, treat the output as a draft and check the source that actually governs the decision.

Read the notes under the form before you rely on a number. They repeat the scope, the steps, and the questions people ask. Related tools sit at the bottom when the next step is a different calculation or a different file. The categories below are the whole library.

AI-Powered Tools. AI assistants for developers and job seekers — explain code, generate SQL, write cover letters and interview answers, check résumés for ATS, debug errors, commits, PRs, docs and tests. AI assistants for developers & job seekers. Open that category and read the line under each tool name before you click. The line is the job the tool actually does.

Handwriting OCR. AI-powered handwriting tools — OCR in 30+ languages, form & table extractors, math to LaTeX, Markdown conversion, and note summarizers. Upload a photo and get editable digital text. OCR, forms, tables, math & notes. Open that category and read the line under each tool name before you click. The line is the job the tool actually does.

Freelancer Tools. Free client-side tools for freelancers — contracts, proposals, NDAs, rate calculators, quotes, and change orders. No signup, no subscription. Contracts, rates & client docs — free. Open that category and read the line under each tool name before you click. The line is the job the tool actually does.

DevOps Tools. Client-side generators and validators for infrastructure, CI/CD and networking — configs, manifests and scripts you can copy straight into your project. Configs, manifests & scripts. Open that category and read the line under each tool name before you click. The line is the job the tool actually does.

Health & Fitness. Free health and fitness calculators — hydration, macros, heart-rate zones, training and more. Instant, private and running entirely in your browser. Fitness, nutrition & wellbeing. Open that category and read the line under each tool name before you click. The line is the job the tool actually does.

Text Tools. Browser-based utilities for counting, converting, cleaning, and transforming text. Write, clean & transform text. Open that category and read the line under each tool name before you click. The line is the job the tool actually does.

Developer Tools. Client-side coding utilities for formatting, converting, encoding and inspecting data. Format, convert & debug code. Open that category and read the line under each tool name before you click. The line is the job the tool actually does.

Security & Password Tools. Privacy-first, in-browser tools for passwords, hashing, encryption and key generation. Passwords, hashing & crypto. Open that category and read the line under each tool name before you click. The line is the job the tool actually does.

PDF Tools. Browser-based tools to merge, split, convert, compress, and edit PDF files. Merge, split & convert PDFs. Open that category and read the line under each tool name before you click. The line is the job the tool actually does.

Image Tools. Browser-based tools to convert, resize, compress, crop, and edit images. Resize, compress & convert images. Open that category and read the line under each tool name before you click. The line is the job the tool actually does.

Color Tools. Browser-based color pickers, converters, palette and gradient generators. Pick, convert & build palettes. Open that category and read the line under each tool name before you click. The line is the job the tool actually does.

Calculators. Financial, health, math, date and everyday calculators that run entirely in the browser. Finance, health & math. Open that category and read the line under each tool name before you click. The line is the job the tool actually does.

Unit Converters. Instant client-side converters for length, weight, volume, temperature, and other measurement units. Convert any unit instantly. Open that category and read the line under each tool name before you click. The line is the job the tool actually does.

SEO & Web Tools. Comprehensive SEO suite — keyword research, technical audits, content optimization, rank tracking, backlinks, internal linking, schema, and AI SEO workflows. Research, audits, schema & AI SEO. Open that category and read the line under each tool name before you click. The line is the job the tool actually does.

Social Media Tools. Client-side helpers for crafting, styling, and mocking up social media content and posts. Captions, fonts & mockups. Open that category and read the line under each tool name before you click. The line is the job the tool actually does.

Content Creator Tools. Free browser tools for YouTubers, podcasters & social creators — video editing, script extraction, voiceovers, captions & more. No signup for browser tools; AI script studio uses daily free runs. Video editor, script studio & voiceovers. Open that category and read the line under each tool name before you click. The line is the job the tool actually does.

Converters & Generators. Client-side data converters and utility generators for developers, students, and everyday users. Data converters & generators. Open that category and read the line under each tool name before you click. The line is the job the tool actually does.

Home & Trade Calculators. Free home, workshop, electrical, and property calculators — BTU, AC tonnage, lumber, deck, voltage drop, refinance, rental cash flow, and more. Runs in your browser. Home, workshop, electrical & property. Open that category and read the line under each tool name before you click. The line is the job the tool actually does.

Pick the tool whose description matches the input you have. If the description does not mention that input, it is the wrong page. Run the form, read the result next to the labels, and only then copy it into a document, a message, or a spreadsheet.

How to read a result

A calculator answers the question printed on the page. A mortgage page returns principal, interest, tax, and insurance when you enter those amounts. It does not know your lender’s fees, your credit score, or a rate that changes next month. Change the rate, the term, or the down payment and read the new payment next to the old one before you decide. The same habit works for a loan, a retirement contribution, a paint job, or a calorie target: one input at a time, then the line that moved.

Units are part of the answer. A length converter shows both sides of the pair you picked. A concrete page asks for feet or metres because a yard of concrete is a volume, not a length. If the label says per month, do not type a yearly figure in that box. Dates matter on age, pregnancy, countdown, and interest pages: the day you enter is the day the formula uses. Round only after you have the full figure, and keep the same rounding when you compare two cases.

File tools follow the file. A PDF merge keeps page order as you arranged the files. Split and extract keep the pages you selected. Compress makes the file smaller and can soften images inside it. Rotate, crop, watermark, and page numbers change the pages you see, not the words in a scanned image unless the page says it runs OCR. An image resizer changes pixels. A format converter changes the container. Download the result and open it before you send it. If the preview looks wrong, the source file is still on your device and you can run the tool again.

Text tools work on the text in the box. A counter reports words, characters, and sentences for that box only. Case, find-and-replace, and duplicate-line tools rewrite that box. They do not open a document on your computer until you paste. JSON, CSV, and code formatters expect valid input; an error line means the text is not in the shape the tool described. Fix the text or pick the converter that matches the format you actually have.

Search opens a list of every tool name and its one-line description. Type the job, not a slogan: mortgage, merge pdf, word counter, bmi. The match is the name and the description, so a short specific phrase finds the page faster than a long sentence. Category menus are the same library grouped by the kind of work. A tool that is not built yet is marked soon and does not pretend to calculate.

The guide under each tool is the place to check limits. It names the inputs, what the formula leaves out, and the questions people ask before they use the number. Related links are the next tool when the job continues, such as a payment after a loan amount, or a JPG after a PDF page. The blog explains one job in a longer article and links to the tool that does the work. Use the article when you want the reasoning, and the tool when you already have the figures.

Browser tools need a current browser and JavaScript. A very large PDF or image can be slow because it is processed on your machine. Server tools need a connection and count toward the free daily limit. Create an account only if you want that limit lifted. The result on a private page is not stored by the site. Copy what you need, then close the tab if the file was sensitive.