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 discount, tax, shipping, and balance due.
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 →Markup vs Margin Calculator
Convert between markup and margin and find the selling price for a target margin.
For: Anyone confused about the two
Open calculator →Job Cost Calculator
Labor + materials + equipment + subcontractors + other costs. Optionally compare against contract price for profit margin.
For: Contractors and trades
Open calculator →Break-Even Calculator
How many units or jobs you need to sell to cover fixed costs. Standard contribution-margin model.
For: Small business pricing & planning
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 + markup + tax. Cost-plus pricing for residential & small commercial contractors.
For: Residential & small commercial contractors
Open calculator →Cleaning Quote Calculator
Labor + supplies + travel + add-ons + markup. Quote total for residential and commercial cleaning.
For: Cleaning businesses
Open calculator →Net 30 Due Date Calculator
Enter an invoice date and terms (Net 15/30/45/60) to get the due date, overdue status, and accrued late fee.
For: Freelancers, service businesses
Open calculator →Security Deposit Interest Calculator
Interest owed on a tenant security deposit in the 17 states (plus DC) that require it, with the statute for each.
For: Landlords
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 →