Body Fat Calculator
Calculate your body fat percentage using the US Navy circumference method. Enter height, neck, and waist measurements for an instant estimate with fitness category.
Free Online Calculators
Calculate anything online free. Financial, scientific, health, business & more calculators — no signup, instant results.
Available Calculators
BMI Calculator
Calculate your Body Mass Index (BMI) in metric or imperial units and see your healthy weight range.
Calorie & TDEE Calculator
Calculate TDEE and BMR using 4 formulas. Get goal-specific calories, full macro breakdown by preset, and per-meal targets. Metric and imperial.
Loan & Mortgage Calculator
Calculate monthly payments, total interest, and view your full amortization schedule.
Mortgage Calculator
Calculate your monthly mortgage payment, total interest, and full cost breakdown by home price, down payment, loan term, and interest rate.
Age Calculator
Calculate your exact age in years, months, and days. See total days lived, next birthday countdown, and zodiac sign.
Day of Week Finder
Find what day of the week any date falls on. Also shows the day number, ISO week number, days from today, and calendar quarter. Free, browser-based.
Days Between Dates
Calculate the number of days between two dates. Shows total days, complete weeks, business days, weekend days, total hours, and minutes. Free, browser-based.
Percentage Calculator
Calculate percentages instantly — find X% of Y, what percent X is of Y, percentage change, and increase/decrease by a percentage.
Tip Calculator
Calculate tips and split restaurant bills instantly — pick a tip percentage, enter the bill, and divide among any number of people.
Profit Margin Calculator
Calculate gross profit margin and markup from cost and selling price, or find your selling price from a target margin.
Price Discount Calculator
Calculate discounted price, amount saved, and savings percentage from a percentage or fixed discount.
GST / VAT Calculator
Add or remove GST and VAT from any price. Enter an amount and tax rate to get the tax amount and total.
Zakat Calculator
Calculate your annual Zakat on cash, gold, crypto, investments, and business assets. Nisab threshold check included — browser-based, no signup.
Zakat 401(k) Calculator
Calculate Zakat on your 401(k) after deducting outstanding loans, early withdrawal penalty, federal tax, and state tax. Conservative and liberal views shown.
Fuel Cost Calculator
Calculate the fuel cost for any road trip. Enter distance, MPG or L/100km, and gas price. Supports US, UK, and metric units. Instant results, no signup.
Inflation Calculator
Calculate inflation-adjusted dollar values using US CPI data from 1960 to 2025. See cumulative inflation and average annual rate between any two years.
Salary Calculator
Calculate your US take-home pay after federal income tax, FICA, 401(k), and state tax. Live results for any salary, hourly, or monthly pay.
Break-Even Calculator
Calculate break-even units and revenue from fixed costs, variable cost per unit, and selling price. Includes contribution margin and target profit analysis.
Net Worth Calculator
Calculate your personal net worth by entering assets and liabilities. Instantly see total assets, total liabilities, net worth, and debt-to-asset ratio.
...and 29 more calculators
Calculator FAQ
Are these calculators accurate?
Yes. All calculators use standard formulas and provide accurate results for their specific purpose.
Can I use calculators offline?
Yes. Once loaded, most calculators work without internet connection since they run entirely in your browser.