Calculators for practice and revision
Use these free calculators to check your maths, physics or biology. Each tool matches curriculum content from middle to upper school. No account needed.
For practice and tests
Common calculations in exercises and tests (maths, physics, biology).
Simple calculator
Check results quickly: basic ops, memory and history. Handy for maths practice.
- Addition, subtraction, multiplication, division
- Memory (M+, M−, MR, MC) and history
- Handy for maths practice
Fraction calculator
Add, subtract or simplify fractions. Ideal for middle school.
- Fraction arithmetic
- Auto simplify
- Fraction ↔ decimal
Percentages
Calculate percentages, discounts or rates. Useful in maths, economics and physics.
- Percent of a number
- Percent change
- Ratios and rates
Powers and roots
Integer powers, scientific notation and nth roots for algebra and science.
- Positive and negative powers
- Scientific notation
- Link with nth roots
Square and nth roots
Square, cube or nth root. Exact or decimal result for your exercises.
- Square and cube roots
- Simplify roots
- Exact or decimal
Geometry and conversions
Area, volume and number systems to support your work and revision.
Area calculator
Area of square, rectangle, triangle, circle and more (middle to upper school).
- Square, rectangle, triangle, circle
- Formulas at a glance
- Results in units (cm², m²)
Volume calculator
Volume of cube, cuboid, sphere, cylinder, cone. Solid geometry for exams.
- Curriculum solids
- Formulas explained
- Units cm³, m³
Binary converter
Convert decimal ↔ binary. Useful for computing or physics.
- Decimal ↔ binary
- Binary arithmetic
- Number systems practice
Hexadecimal converter
Base-16 numbers (0x notation). Used in computing and some physics.
- Decimal ↔ hexadecimal
- 0x notation
- Base-16 arithmetic
What these calculators are for
Use these calculators to quickly check your maths, physics or biology answers: reliable, a few clicks, no sign-in. Each tool covers curriculum content from middle to upper school.
Examples: check multiplication (7 × 8 = 56), simplify fractions (12/18 = 2/3), discount (20% of €80 = €16), area of a 4 cm square (16 cm²), volume of a 5 cm cube (125 cm³), square root (√18 = 3√2), binary (42 = 101010₂) or hex (1500 = 5DC₁₆). Run several calculations and use history to compare.
These calculators complement the Math AI assistant: here you check results; on the home page you ask your question and get a step-by-step explanation (formulas, method, problem solved).