# Free business calculators

> Work out the numbers in your browser, then save a one-page PDF with the inputs, the results and the formulas. Nothing you type is uploaded, and there is no sign-up to see a result.

Page: https://pdfinish.com/calculators
Last updated: November 1, 2026

## Calculators

- [Profit margin calculator](https://pdfinish.com/profit-margin-calculator): Work out margin, markup and profit from your cost and price, or find the price that gives the margin you want.
- [Hourly rate calculator](https://pdfinish.com/hourly-rate-calculator): Work out the hourly rate, day rate and monthly target a freelancer needs from the income they want, their costs and their time off.
- [Cap rate calculator](https://pdfinish.com/cap-rate-calculator): Work out net operating income and the cap rate of a rental property from its price, income and costs, or the price a target cap rate implies.
- [Rental property calculator](https://pdfinish.com/rental-property-calculator): Work out a rental's monthly cash flow, cash-on-cash return and yearly numbers from the purchase, the loan you type, the rent and the costs.
- [Prorated rent calculator](https://pdfinish.com/prorated-rent-calculator): Work out rent for a partial month from a move-in or move-out date, by actual days, a 30-day month or a 365-day year.
- [Rent increase calculator](https://pdfinish.com/rent-increase-calculator): Turn a rent increase percent into the new rent, or find the percent from the new rent, with the monthly and yearly change.
- [Late fee calculator](https://pdfinish.com/late-fee-calculator): Work out a late rent fee from a flat fee, a percent of rent or a daily fee, with an optional cap, and the total owed.
- [Mileage reimbursement calculator](https://pdfinish.com/mileage-reimbursement-calculator): Work out a mileage amount from your miles or a list of trips and a rate, starting at the IRS standard business rate read from irs.gov.
- [Invoice due date calculator](https://pdfinish.com/invoice-due-date-calculator): Find an invoice's due date from the invoice date and net 7, 15, 30, 45 or 60 terms, with an optional late fee up to the date it was paid.

## Common questions

### Are the calculators free?

Yes. Using a calculator is free and never counted. Saving a result as a PDF counts like any PDFinish file under the free allowance. The editable Excel version of a calculator is part of Pro.

### Do the calculators upload my numbers?

No. Every calculation runs in your browser. Only if you choose Email it to me do we receive the finished PDF, to send it to the address you give.

### Is this financial advice?

No. Results are estimates for planning, not financial, tax or investment advice.