Available now
Start with a focused tool
Live tools include the formula, a checked example, and documented assumptions.
Common tasks
What people use this collection for
- Tip and split a bill
Enter the bill, tip rate, and number of people to see tip, total, and the even split.
- Apply a sale price
Discount reduces a listed price by one rate, or by two rates applied in order. 20% then 10% is not 30% off.
- Compare two packs
Unit Price divides each pack price by its quantity. The lower unit price is the better value if the items match.
Suggested path
From a bill to a shelf comparison
These links go only to published calculators or stay on this page as unlabeled steps.
Questions
About this collection
Should I tip before or after tax?
Customs vary. Enter the subtotal to tip before tax, or the final bill to tip on the total.
Is a tip the same as a discount?
No. Tip adds a percent to a bill. Discount subtracts a percent from a listed price.