All Calculators
Every calculator on the site in one place, grouped by category. Each one shows full working, not just the final answer.
10 calculators across 4 categories, and growing.
Numbers & Fractions
5Percentages, fractions, decimals, roots, and factorization, the building blocks behind most everyday maths.
Percentage Calculator
Basic percentage, reverse percentage, percentage change, and percentage difference in one tool.
Fraction Calculator
Add, subtract, multiply, divide, simplify, and scale fractions, with a recipe-scaling mode.
Decimal to Fraction Calculator
Convert terminating and repeating decimals to exact fractions, plus rounding to practical measurements.
Square Root Calculator
Simplify radicals, find any nth root, and learn to estimate a square root by hand.
Prime Factorization Calculator
Break a number into its prime factors, find GCF and LCM, or build your own factor tree.
Health & Body
3General screening estimates for weight, energy needs, and age, with honest limitations included.
BMI Calculator
Calculate BMI and healthy weight range, with personalized context for where BMI applies less reliably.
Calorie Calculator
Estimate BMR and maintenance calories, compare activity levels, and check a safe goal timeline.
Age Calculator
Exact age in years, months, and days, plus birthday insights like day-of-week born and next milestone.
Computer Science
1Number systems and logic used in programming, networking, and digital electronics.
Binary Calculator
Binary arithmetic, conversion to decimal/hex/octal, bitwise logic, and an interactive bit grid.
More Computer Science calculators coming soon
Physics
1Motion, speed, and acceleration calculations from introductory kinematics.
Velocity Calculator
Distance/time, constant acceleration, average velocity, and a real-world speed comparison.
More Physics calculators coming soon