Calculators that actually just work.

Federal Income Tax Percentage Calculator

Estimate US federal income tax, effective and marginal rate with a full bracket-by-bracket breakdown.

Percent Off Calculator

Find the sale price and amount saved from any discount, with optional second discount and sales tax.

Mortgage Calculator

Estimate your monthly mortgage payment with principal, interest, taxes and insurance, plus a yearly amortization summary.

Loan Calculator

Monthly payment, total interest and a full amortization schedule for any fixed-rate loan.

Auto Loan Calculator

Car loan calculator with vehicle price, down payment, trade-in, sales tax, term and APR for your true monthly payment.

Compound Interest Calculator

Project savings growth with compound interest, monthly contributions and any compounding frequency.

Sales Tax Calculator

Add sales tax to a pre-tax price or extract the tax from a tax-inclusive total. Live results.

Income Tax Calculator

Estimate US federal income tax with standard or itemized deduction, all four filing statuses, and a bracket breakdown.

Salary Calculator

Convert salary between hourly, weekly, bi-weekly, monthly and annual pay — instantly.

Interest Calculator

Simple vs compound interest side by side: see exactly how much faster your money grows.

Investment Calculator

Project investment growth with starting amount, monthly contributions and an expected annual return.

Retirement Calculator

Project your retirement nest egg and a rough monthly withdrawal estimate based on age, savings and contributions.

Amortization Calculator

Full month-by-month amortization schedule for any fixed-rate loan with totals and a yearly summary view.

Credit Card Payoff Calculator

Estimate months to pay off a credit card, total interest, and what monthly payment a target payoff requires.

Savings Calculator

Project your savings balance from an initial deposit, monthly contributions and an interest rate.

Inflation Calculator

Convert US dollars between years using BLS CPI data. See real purchasing power and annualised inflation rate.

Down Payment Calculator

Find the down payment amount, loan size and PMI status for any home price — edit percent or dollars, both update live.

Time and a Half Calculator

Calculate time and a half overtime pay from your hourly rate and hours — weekly total, annual estimate and effective rate.

Salary Paycheck Calculator Hourly

Estimate your hourly paycheck after federal tax, FICA and state tax, with per-period and annual take-home pay.

BMI Calculator

Calculate Body Mass Index from height and weight in metric or imperial.

Child's BMI Calculator

Estimate a child or teen BMI percentile band by age and sex.

Due Date Calculator

Estimate your pregnancy due date, current week and trimester from your LMP.

Chipotle Calorie Calculator

Build your Chipotle order and see the total calories instantly.

Macro Calculator

Daily calories plus protein, carbs and fat for your goal.

Starbucks Calorie Calculator

Pick a Starbucks drink, size, milk and syrups to total the calories instantly.

Starbucks Coffee Calorie Calculator

Calorie counter for Starbucks coffee drinks — size, milk and syrups.

Subway Calorie Calculator

Build a Subway sub and see the calories live with a per-item breakdown.

Recipe Calorie Calculator

Add ingredients and amounts to get total and per-serving calories.

MyPlate Calorie Calculator

Estimate your daily calorie needs USDA MyPlate style with Mifflin-St Jeor.

Weight Loss Percentage Calculator

Calculate the percentage of body weight lost, your progress and weight remaining to goal.

Weight Gain Calorie Calculator

Daily calorie target for lean weight gain plus a protein goal — Mifflin-St Jeor.

Calorie Calculator to Lose Weight

Calories per day for safe weight loss, with time-to-goal estimate.

Food Calorie Calculator

Search a database of 200+ common foods, build a meal and see total calories with macros.

Calorie Calculator

Estimate daily calories for maintenance, weight loss or weight gain using the Mifflin-St Jeor equation.

BMR Calculator

Calculate basal metabolic rate using Mifflin-St Jeor and Harris-Benedict side by side.

TDEE Calculator

Total Daily Energy Expenditure for any activity level, with a breakdown across all five activity multipliers.

Body Fat Calculator

Estimate body fat percentage with the US Navy method using neck, waist (and hip for women) measurements.

Ideal Weight Calculator

Ideal weight range from the Devine, Robinson and Hamwi formulas plus the healthy BMI range for your height.

Protein Calculator

Daily protein target in grams based on your weight and goal, from general health to muscle gain.

Calories Burned Calculator

Estimate calories burned for 60+ activities using MET values, your weight and duration.

One Rep Max Calculator

Estimate your one-rep max with Epley and Brzycki formulas plus a full training percentage table.

Pace Calculator

Solve for pace, time or distance, with race finish-time estimates for 5K, 10K, half and full marathon.

Water Intake Calculator

Estimate recommended daily water intake in liters and ounces based on weight, activity and climate.

Pregnancy Calculator

Track your pregnancy week, trimester, due date and key milestones from LMP, due date, conception or ultrasound.

Ovulation Calculator

Estimate your ovulation day, fertile window and next period from your last period and cycle length.

Conception Calculator

Estimate your conception date and fertile window from a due date or your last menstrual period.

Pregnancy Weight Gain Calculator

Recommended pregnancy weight gain range based on IOM guidelines for your BMI, week and single or twins.

Period Calculator

Predict your next period dates and fertile windows from your last period, cycle length and period length.

Calorie Deficit Calculator

Find your daily calorie target for weight loss from BMR, TDEE and your goal weight, with a safe-pace check and macros.

Percentage Calculator

Multi-mode percentage calculator: X% of Y, X is what % of Y, percent change, add or subtract a percent.

GPA Calculator

Credit-weighted GPA calculator on the US 4.0 scale, with an optional prior-GPA mode for cumulative GPA.

Percentage Calculator

All-in-one percentage calculator: X% of Y, X is what % of Y, percent change, and add or subtract a percent.

Fraction Calculator

Add, subtract, multiply or divide fractions. Simplified result, decimal value and step-by-step working.

Average Calculator

Find the mean, median, mode, range, sum and count of any list of numbers — live as you type.

Standard Deviation Calculator

Population and sample standard deviation, variance and mean for any data set, with the formula and steps.

Ratio Calculator

Solve A:B = C:D for the missing value or simplify any ratio to its lowest terms.

Random Number Generator

Generate random integers between any min and max, with or without duplicates. One-click copy to clipboard.

Scientific Calculator

Full scientific calculator with powers, roots, logs, trig, parentheses, pi, e and memory. Keyboard support.

Percent Error Calculator

Calculate percent error and absolute error from an observed value and the true value, with the formula shown.

Exponent Calculator

Raise any base to any power — negative and decimal exponents supported — with step-by-step working.

Square Root Calculator

Find the square root or any nth root of a number, with the simplified radical form where it is clean.

Rounding Calculator

Round any number to decimal places, the nearest whole, or the nearest 10, 100 or 1000 with several modes.

Area Calculator

Calculate the area of a rectangle, triangle, circle, trapezoid and more, with the formula for each shape.

Age Calculator

Calculate your age from date of birth instantly.

Chronological Age Calculator

Exact chronological age in years, months and days for school and clinical use.

Date Calculator

Add or subtract days, weeks, months and years, or find the days between two dates.

Numerology Life Path Number Calculator

Find your numerology life path number from your birthdate, with the step-by-step reduction and your number’s meaning.

Half Birthday Calculator

Find your half birthday — exactly six months from your birthday — with a countdown, your half age and fun facts.