Free Business Tools & Calculators
Free, interactive calculators for the math behind everyday business decisions. No signup. Runs entirely in your browser — your data never leaves your device.
Invoice Calculator
Itemized invoice math with tax and discount support. Get the total instantly.
For: Freelancers, service businesses
Open calculator →Profit Margin Calculator
Calculate margin from revenue and cost, or find the price needed for a target margin or markup.
For: Small business pricing decisions
Open calculator →Late Rent Fee Calculator
Flat, percentage, or per-day late fee structures with grace period support.
For: Landlords
Open calculator →Contractor Estimate Calculator
Labor + materials + overhead + profit + tax. Built for the way small contractors price work.
For: Residential & small commercial contractors
Open calculator →Need the editable document, not just the math?
Every calculator pairs with a downloadable business template — fillable PDF or editable Word/Excel.
Browse all templates →