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Calculators
Free, instant calculators for health, finance and everyday math. No signup. Works in your browser.
18 calculators
Health & fitness
BMI Calculator
Calculate your Body Mass Index and see where you fall on the WHO classification scale. No sign-up, no paywall.
Try it →TDEE Calculator
Estimate your Total Daily Energy Expenditure — the calories you actually burn each day. Includes cut, maintain and bulk targets.
Try it →Macro Calculator
Split your daily calories into protein, carbs and fat — instantly. Pick your goal and get exact grams to hit each day.
Try it →Pregnancy Due Date Calculator
Find your estimated due date, current gestational age and trimester from your last menstrual period.
Try it →Ovulation Calculator
Estimate your most fertile days based on your last period and cycle length.
Try it →Sleep Cycle Calculator
Find the best time to go to bed — or to wake up — based on 90-minute sleep cycles, so you wake feeling refreshed instead of groggy.
Try it →Running Pace Calculator
Pace, time, distance, and race-time predictions — switch the mode and we'll solve for whatever's missing.
Try it →Money & finance
Loan Calculator
Estimate your monthly payment, total cost, and total interest on any fixed-rate loan.
Try it →Compound Interest Calculator
See how your money grows when interest earns interest. Add monthly contributions to project your wealth over time.
Try it →Mortgage Calculator
Estimate your monthly mortgage payment including principal, interest, taxes, insurance, and HOA. See how rate and term change the total cost of your home loan.
Try it →Tip Calculator
Work out the tip, the total bill, and what each person owes — split a check fairly in seconds.
Try it →Discount Calculator
Find the sale price, the original price, and exactly how much you save — including stacked Black Friday-style "extra X% at checkout" deals.
Try it →Hourly to Salary Calculator
Convert an hourly wage to annual salary — or the other way around — with paid-vacation, weekly, monthly, and daily breakdowns.
Try it →Everyday math
Age Calculator
Calculate your exact age in years, months, and days from any birth date — plus your total months, weeks, days, hours, and minutes alive, and the days until your next birthday.
Try it →Percentage Calculator
Three percentage calculations in one tool: what is X% of Y, X is what percent of Y, and the percent change between two numbers. Instant results, no signup.
Try it →Date Difference Calculator
Find the exact span between any two dates — in years, months, days, weeks, hours, and minutes.
Try it →Rule of Three Calculator
Solve any direct or inverse proportion in seconds — fill in three values and we find the fourth.
Try it →Pet Age Calculator
How old is your dog or cat in human years? Get the modern, size-aware estimate — not the outdated 7× rule.
Try it →