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Mathematics Tools
901 free calculators, converters and checkers — built for SG, MY and the region, reviewed with current figures. No accounts, no paywalls.
Area and perimeter of any 2D shape
Simplify an aspect ratio and resize without distortion
A fast, free online calculator
Binary, hex and bitwise arithmetic
Goodness-of-fit + independence
Area, circumference, radius, sector & arc
Arithmetic, polar form, powers and roots
CI for mean + proportion
r, p-value and 95% CI from paired data
Differentiate any function, exactly
Cohen's d + Hedges' g
Raise any number to any power
Factor polynomials and find their roots
Add, subtract, multiply and divide fractions
Greatest common divisor and least common multiple
Antiderivatives and definite integrals
Evaluate limits, one-sided or at infinity
Solve 2×2 and 3×3 systems with working
Slope + intercept + r + R² + scatter
log, ln, log₂ and any custom base
Long division with full worked steps
Determinant, inverse, eigenvalues and more
Mean, median, mode, spread, quartiles & outliers
Mod, GCD, modular inverse and power
Square root, cube root, any nth root + surds
Write any number in words
F-test + eta-squared
How far a measurement is from the true value, as a percentage
nPr, nCr, factorial (BigInt)
Add, multiply, divide and evaluate polynomials
Is it prime? Plus full factorisation
Solve a : b = c : x for the missing value
Find a missing side of a right triangle
ax^2+bx+c=0 real + complex
Simplify any ratio to its lowest terms
Round to places, sig figs, or nearest 5/10/100
Cochran + A/B test power
Trig, logs, powers, roots and more
Nth term and sum of an arithmetic or geometric sequence
Mean, SD, variance, quartiles
SE of mean + proportion
One-sample / Welch / paired
Solve any triangle from 3 measurements
SSS/SAS/ASA/AAS/SSA
sin, cos, tan, their reciprocals and inverses
Dot, cross, magnitude, angle and projection
Volume and surface area of any solid
Standard score + percentile + p-value
Calculate percentages, discounts, tips and changes — the fastest percentage tool online.