Free Online Calculators

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Tip Calculator

Calculate tip, split the bill, and see per-person totals in seconds.

Weighted & unweighted GPA on the 4.0 scale. Add all your courses.

Find out exactly what you need on your final exam to hit your target grade.

Time-and-a-half, double time, and state daily-overtime rules.

Cubic yards, bag counts, and cost for slabs, footings, and columns.

Your true hourly rate — after PTO, holidays, and real hours.

Snowball vs avalanche — your debt-free date and interest saved.

Flat, tiered, quota & bonus — model your real comp plan.

Cubic yards, bag counts, and cost for any bed.

How many months until refinancing pays for itself?