Tip, gas, discount, and daily-life calculators. Each tool is built for clear inputs, useful defaults, validation, and steps when the calculation needs context.
Fuel Economy Calculator
Calculate MPG, L/100 km, trip fuel used, and trip fuel cost from distance, fuel, and price.
Unit Price Calculator
Compare price per unit for two products and find the better buy by ounce, pound, item, liter, or any unit.
Speed Distance Time Calculator
Solve for speed, distance, or time using the distance = speed x time relationship with unit-friendly steps.