Does the calculator follow order of operations?
Yes. Use parentheses when a rate, discount, or grouped step should happen before the rest of the expression.
Calculator
A keyboard-friendly scratch calculator for quick totals, percentages, ratios, per-unit costs, and order-of-operations checks while you work in the browser.
Use it as a scratchpad, not a spreadsheet
Use the calculator for checking an invoice line, splitting a total, estimating a markup, comparing unit prices, or confirming a chained expression before you paste the result somewhere else.
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Good scratchpad calculations
- Subtotal plus tax.
- Sale price from a list price and discount.
- Per-item or per-unit price.
- Split bill or shared cost.
- Ratio scaling for a recipe, plan, or estimate.
- Quick margin or markup checks.
Input habits that avoid mistakes
- Type the full expression when you need an audit trail.
- Use parentheses around rates and grouped steps.
- Check the expression before copying the result.
- Use Backspace for one-character fixes instead of clearing everything.
- Clear between unrelated calculations.
Useful calculator patterns
These patterns cover the quick arithmetic people usually reach for before moving to a dedicated tool.
Taxed total
Sale price
Unit price
Scaled amount
Use a dedicated calculator when the workflow needs labeled inputs or a reusable formula.
FAQ
When should I use a dedicated percentage calculator instead?
Use this calculator for quick arithmetic. Use a percentage-specific tool when you want labeled fields, fewer typing mistakes, or a reusable percent workflow.
