Simple, practical tools to calculate, convert, plan, and get things done.
Everyday calculations, conversions, and practical decisions made simpler.
When dining with others, dividing a bill can produce indivisible remainder cents. Our tip calculator transparently assigns remainder pennies so everyone pays their fair share and the sum matches the receipt total to the penny.
Whether finding what percentage one number is of another, tracking relative increases or decreases, or working backwards from a discounted total to find the original pre-tax price, clear formulas make calculations simple.