Calculators
Get numeric answers for maths, physics and biology. Pick a tool, enter your figures — no login. For full working and reasoning, use the main solver.
Numbers and operations
Fractions, percentages, powers and roots — everything you need for homework and exams.
Simple calculator
Add, subtract, multiply, divide; memory and history for quick everyday sums.
- Addition, subtraction, multiplication, division
- Memory (M+, M−, MR, MC) and history
- Useful for everyday maths
Fraction calculator
Four operations, simplification, mixed numbers and fraction–decimal conversion.
- Four operations on fractions
- Auto-simplify
- Fraction ↔ decimal
Percentages
Find a percent of a number, apply increase or decrease, ratios and change rate.
- Percent of a number
- Increase and decrease
- Ratios and change rate
Powers and roots
Powers and scientific notation; link through to nth roots.
- Positive and negative powers
- Scientific notation
- Link with nth roots
Square and nth roots
Square, cube or nth root; get an exact form or a decimal.
- Square and cube roots
- Simplify roots
- Exact or decimal
Shapes and number systems
Area, volume, and conversions between decimal, binary and hex.
Area calculator
Area of squares, rectangles, triangles, circles and other 2D shapes; formulae on page.
- Square, rectangle, triangle, circle
- Formulae at a glance
- Results in units (cm², m²)
Volume calculator
Volume of cube, cuboid, sphere, cylinder, cone; formulae on page.
- Common 3D shapes
- Formulae explained
- Units cm³, m³
Binary converter
Convert between decimal and binary; do base-2 arithmetic.
- Decimal ↔ binary
- Binary arithmetic
- Practice with number bases
Hexadecimal converter
Convert between decimal and hex; base-16 and 0x notation.
- Decimal ↔ hexadecimal
- 0x notation
- Base-16 arithmetic
What you can do here
These tools give you instant numeric answers in a few clicks, no sign-in. They cover common school and exam topics from Key Stage 3 upwards.
E.g. 7×8=56, 1/4+1/5=9/20, 18% of 250=45, 6 cm square area=36 cm², 5 cm cube volume=125 cm³, √18=3√2, 31=11111₂, 256=100₁₆. Use the history list to repeat or compare sums.
Calculators give the answer; the MathsGPT solver on the home page gives the working — formulae, steps and a full explanation when you paste the same question.