AllCalc

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Math, finance, health, conversions, and more — free, instant, no signup.

Math
Standard Calculator
Basic arithmetic
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Scientific Calculator
Trig, logs, powers, constants
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Graphing Calculator
Plot multiple functions simultaneously — drag to pan, scroll to zoom
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Drag · scroll · pinch to navigate
Enter an expression like sin(x), x^2, or 2x+3
Percentage Calculator
Three common percentage problems
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Fraction Calculator
Add, subtract, multiply and divide
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Statistics Calculator
Mean, median, mode, std dev, more
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Pythagorean Theorem
Find any side of a right triangle
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Quadratic Equation
Solve ax² + bx + c = 0
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Ratio Calculator
Simplify and find missing values
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Finance
Mortgage Calculator
Monthly payment and total cost
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per month
Mortgage Payoff Calculator
See when your mortgage could be paid off
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estimated payoff time
Loan Calculator
Monthly payment and total interest
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per month
Compound Interest
Investment growth over time
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total value
Tip Calculator
Split the bill between people
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Salary Calculator
Hourly ↔ annual ↔ monthly
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Discount Calculator
Final price and total savings
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final price
Profit Margin
Gross margin and markup
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gross margin
Sales Tax Calculator
Add or remove tax from a price
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Health
BMI Calculator
Body Mass Index
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kg
cm
UnderNormalOverObese
Calorie Calculator
Daily energy needs (TDEE)
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kg
cm
calories/day to maintain weight
Blood Pressure Checker
Understand your reading
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Daily Water Intake
How much water to drink per day
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kg
recommended daily water intake
Pregnancy Due Date
Estimated delivery date
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estimated due date
Fitness
Macro Calculator
Protein, carbs and fat targets
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One Rep Max (1RM)
Estimate your maximum lift
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estimated 1RM (Epley formula)
Calories Burned
By activity and duration
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calories burned
Running Pace
Pace, speed and finish time
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Everyday
Age Calculator
Exact age to the day
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Date Difference
Days, weeks, months between dates
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days
Time Calculator
Between times or add/subtract time
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Speed / Distance / Time
Calculate any one from the other two
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Bill Splitter
Divide any bill between people
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per person
Random Number Generator
Fair random decisions
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Fuel Cost Calculator
Cost of a trip or per km/mile
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Useful Tools
Square Footage
Area, perimeter and material cost
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square feet
Simple Interest
Interest earned or charged
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total amount
Auto Loan
Car payment and total interest
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per month
Unit Price
Compare cost per unit
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per unit
GCD & LCM
Greatest common divisor and multiple
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Date Add / Subtract
Find a date after or before a duration
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result date
Conversions
Unit Converter
Length, weight, temp, speed, area, volume
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Temperature Converter
°C ↔ °F ↔ K
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Type in any field to convert all three at once.

Education
GPA Calculator
Weighted 4.0-scale GPA
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GPA on a 4.0 scale
Grade Calculator
Weighted average of assignments
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Science
Half-Life Calculator
Radioactive decay and remaining quantity
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remaining
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About AllCalc

AllCalc is a free calculator hub with 45+ calculators covering math, finance, health, fitness, conversions, and everyday use. Everything runs entirely in your browser — no accounts, no sign-up, no tracking. Results are for general reference only and are not a substitute for professional financial, medical, or legal advice.

Privacy

All calculations happen locally in your browser. No inputs are sent to any server. We do not collect personal data.

Terms

AllCalc provides general reference calculations. Verify important results independently. Use is at your own risk.