1,000+ Free Calculators

Calculate anything that matters.

Mortgage payments, BMI, loan amortization, take-home pay — get instant, accurate answers without the guesswork.

Finance
Mortgage Calculator
$1,842/mo
30yr · $320,000 · 6.8% APR
Health
BMI Calculator
22.4
Normal weight ✓
Payroll
Take-Home Pay
$4,217
After tax · monthly
Math
Amortization Schedule
$118K saved
With extra $200/mo payments
Trending
Mortgage Calculator BMI Calculator Amortization Schedule Car Loan Calorie Deficit Roth IRA Paycheck Calculator Personal Loan

Browse by Category

View all →
💰
Finance
Mortgage · Loans · Amortization · CD · Refinance
 ❤️
Health & Fitness
BMI · Calories · Macros · TDEE · Body Fat
 📐
Math & Education
Algebra · Geometry · Statistics · GPA · Grade
 🧾
Payroll & Salary
Take-home · Hourly · Tax · Commission · Bonus

💰 Finance Calculators

See all 400+ →
Finance
Mortgage Calculator
Estimate monthly payments, total interest, and breakdown for any home loan.
Calculate →
Finance
Amortization Schedule
See exactly how every payment splits between principal and interest over time.
Calculate →
Finance
Car Loan Calculator
Find your monthly auto payment, total cost, and interest paid.
Calculate →
Finance
Roth IRA Calculator
Project your retirement savings and see the power of tax-free compounding.
Calculate →
Finance
CD Calculator
Calculate your certificate of deposit earnings at maturity.
Calculate →
Finance
Refinance Calculator
Is refinancing worth it? Calculate break-even point and lifetime savings.
Calculate →

❤️ Health & Fitness

See all 200+ →
Health
BMI Calculator
Calculate your Body Mass Index and see what it means for your health.
Calculate →
Health
Calorie Deficit Calculator
Find your daily calorie target for steady, sustainable weight loss.
Calculate →
Health
Calorie Calculator
Get your daily calorie needs based on age, weight, height, and activity level.
Calculate →
Health
Macro Calculator
Break down your ideal protein, carb, and fat intake for any fitness goal.
Calculate →
Health
TDEE Calculator
Total Daily Energy Expenditure — how many calories you actually burn per day.
Calculate →
Health
Body Fat Calculator
Estimate your body fat percentage using body measurements.
Calculate →

📐 Math & Education

See all 300+ →
Math
Percentage Calculator
Calculate percentages, percentage change, and what percent X is of Y.
Calculate →
Math
Grade Calculator
Calculate your current grade and what you need on your final exam.
Calculate →
Math
GPA Calculator
Calculate your semester or cumulative GPA from your course grades.
Calculate →
Math
Slope Calculator
Find the slope, intercept, and equation of a line from two points.
Calculate →
Math
Scientific Calculator
Full-featured online scientific calculator with trig, logs, and more.
Calculate →
Math
Fraction Calculator
Add, subtract, multiply, divide fractions and simplify results instantly.
Calculate →

🧾 Payroll & Salary

See all 150+ →
Payroll
Paycheck Calculator
Calculate your exact take-home pay after federal, state, and local taxes.
Calculate →
Payroll
Hourly to Salary Calculator
Convert any hourly rate to annual salary and monthly take-home pay.
Calculate →
Payroll
Commission Calculator
Calculate your commission earnings at any rate, split, or tiered structure.
Calculate →
Payroll
Bonus Calculator
See how much of your bonus you'll actually take home after taxes.
Calculate →
Payroll
Overtime Calculator
Calculate overtime pay at 1.5x or 2x rates for any hours worked.
Calculate →
Payroll
Time Card Calculator
Track hours worked and calculate total pay for any pay period.
Calculate →