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50+ categories covering every calculation you can think of — and thousands you have not thought of yet.
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Formula Always Shown
You see the exact equation behind every result. Not just a number — the full reasoning behind it.
Copy & Reset
One tap copies the result to your clipboard. Reset clears all fields so you can run a new scenario instantly.
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10,000 Tools in One Place
The most complete free calculator library on the web — from crypto to construction, finance to fitness.
Popular Calculators
Start here — these are the tools thousands of people open every day.
Mortgage Calculator
Monthly payment, total interest & amortization
BMI Calculator
Body mass index with healthy range breakdown
Compound Interest
Future value with regular contributions
Tip Calculator
Split the bill & calculate tip per person
Salary Calculator
Hourly to annual, gross to net conversion
GPA Calculator
Weighted & unweighted GPA in seconds
Fuel Economy Calculator
MPG, cost per mile & full trip fuel cost
Retirement Savings
Nest egg projections by age & return rate
Percentage Calculator
Increase, decrease, of, off — every variation
Your answer is
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