Shopping calculators

Tips, bill splitting, discounts, and simple purchase checks.

Shopping tools

Use these calculators for general informational estimates and simple arithmetic. Check the formula, units, examples, and limitations on each calculator page before relying on a result.

Discount calculator

Calculate sale price after stacked discounts, coupon amount, tax, and shipping.

Tip calculator

Calculate tip, tax-aware total, per-person split, and optional rounding.

Split bill calculator

Split a bill with tax, tip, optional extra amount, and rounding.

How to use this category

Choose the calculator that matches the task and units you have.
Enter realistic values from your receipt, recipe, schedule, room measurement, appliance label, or trip plan.
Read the visible formula, result breakdown, and assumptions before using the estimate.

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These tools do not replace qualified professional review. Use them for transparent arithmetic, quick checks, and low-stakes planning only.