All Free Calculators & Tools

More than 180 free online calculators across finance, health, math, construction, education and more. No signup, no downloads.

Every calculator on the site, grouped by topic. Each category page adds a short guide to choosing between similar tools, and every calculator explains its formula, works an example, and notes its limits.

Finance & Money (57 calculators)

401(k) Calculator

529 Plan Calculator

Amortization Calculator

Break-Even Calculator

British Pounds to US Dollars

Budget Calculator

Compound Interest Calculator

Credit Card Payoff Calculator

Currency Converter

Debt Payoff Calculator

Debt-to-Income Ratio Calculator

Depreciation Calculator

Discount Calculator

Dividend Calculator

Down Payment Calculator

Emergency Fund Calculator

Gold Calculator

HELOC Calculator

Home Equity Calculator

Hourly to Salary Calculator

Income Tax Calculator

Inflation Calculator

Investment Calculator

Life Insurance Calculator

Loan Calculator

Margin Calculator

Money Market Calculator

Mortgage Calculator

Mortgage Payoff Calculator

Net Worth Calculator

Overtime Calculator

Paycheck Calculator

Payment Calculator

Payroll Calculator

Payroll Tax Calculator

Personal Loan Calculator

Raise Calculator

Refinance Calculator

Rent Affordability Calculator

Rent Calculator

Rent vs Buy Calculator

Retirement Calculator

Roth IRA Calculator

Salary Calculator

Sales Tax Calculator

Savings Calculator

Simple Interest Calculator

Social Security Calculator

Stock Calculator

Health & Fitness (26 calculators)

Anion Gap Calculator

BMI Chart & Calculator

Blood Pressure Calculator

Body Fat Calculator

Bra Size Calculator

Calorie Calculator

Calorie Deficit Calculator

Calories Burned Calculator

Due Date Calculator

Heart Rate Calculator

Ideal Weight Calculator

Macro Calculator

Maintenance Calorie Calculator

Ovulation Calculator

Pace Calculator

Pregnancy Calculator

Protein Calculator

Sleep Calculator

Steps to Miles Calculator

TDEE Calculator

Water Intake Calculator

Weight Loss Calculator

Math & Science (35 calculators)

Algebra Calculator

Area Calculator

Average Calculator

Binary Calculator

Decimal to Fraction Calculator

Distance Formula Calculator

Exponent Calculator

Fraction Calculator

Graphing Calculator

Logarithm Calculator

Long Division Calculator

Mixed Number Calculator

Partial Derivative Calculator

Percent Error Calculator

Percentage Calculator

Percentage Change Calculator

Percentage Increase Calculator

Prime Number Checker

Probability Calculator

Pythagorean Theorem Calculator

Quadratic Formula Calculator

Radical Calculator

Ratio Calculator

Roman Numeral Converter

Scientific Calculator

Scientific Notation Calculator

Significant Figures Calculator

Slope Calculator

Speed Distance Time Calculator

Square Root Calculator

Statistics Calculator

Triangle Calculator

Volume Calculator

Z-Score Calculator

Time & Date (12 calculators)

Age Difference Calculator

Countdown Calculator

Date Calculator

Days Calculator

Hours Calculator

Hours to Decimal Calculator

Military Time Converter

Time Calculator

Timecard Calculator

Timezone Converter

Work Hours Calculator

Construction & Home (21 calculators)

Asphalt Calculator

Concrete Calculator

Concrete Cost Calculator

Conduit Fill Calculator

Cubic Feet Calculator

Fence Calculator

Flooring Calculator

Gravel Calculator

Grout Calculator

Intex Pool Calculator

Lumber Calculator

Mulch Calculator

Paint Calculator

Rock Calculator

Roofing Calculator

Sand Calculator

Square Footage Calculator

Stair Calculator

Stone Calculator

Tile Calculator

Topsoil Calculator

Education (7 calculators)

ACT Score Calculator

AP Lang Score Calculator

Cumulative GPA Calculator

Grade Calculator

LSAT Score Calculator

Reading Time Calculator

Automotive (8 calculators)

Auto Loan Calculator

Car Depreciation Calculator

Car Lease Calculator

Car Loan Calculator

Car Payment Calculator

Fuel Cost Calculator

Mileage Calculator

Wheel Offset Calculator

General & Everyday (9 calculators)

AWS Pricing Calculator

Basic Calculator

CM to Feet and Inches Converter

Kg to Pounds Converter

Parlay Calculator

Password Generator

Fun & Random (9 calculators)

Chinese Zodiac Calculator

Coin Flip

Lottery Number Generator

Love Calculator

Numerology Calculator

Random Name Picker

Random Number Generator

Zodiac Sign Calculator