Online Calculators

Calculate average speed for running, cycling, driving, travel planning, workouts, and school math problems.

Calculate increase or decrease percentages for prices, traffic, sales, grades, and before-versus-after comparisons.

Add or subtract calendar time to find due dates, deadlines, reminders, and planning milestones quickly.

Calculate duration between two timestamps for shift planning, scheduling, projects, travel, and event timing.

Calculate overtime pay, overtime rate, and total pay for weekly schedules, payroll checks, and shift planning.

Estimate fuel used and trip cost for commuting, road trips, delivery routes, and driving budget checks.

Compare price per unit for groceries, office supplies, bulk buys, and product size options before you purchase.

Calculate ROI percentage, net profit, and return multiple for campaigns, products, deals, and simple investment checks.

Estimate sales commission from a percentage rate plus any fixed bonus or fee.

Calculate break-even units, revenue needed, and contribution margin per unit.