Invoice total calculator
Subtotal, discount, tax and the final amount due.
- Who needs it
- Anyone checking an invoice before sending it.
- Example
- Add 15% tax after a 10% discount.
Free Business Calculators
Simple Calculators for Invoicing, Pricing and Small Business. Choose a focused tool, see the calculation clearly and use the result in your next document or decision.
Invoicing
Late payment fee calculator
Interest on an overdue invoice at your stated rate.
- Who needs it
- Businesses applying an agreed or permitted late fee.
- Example
- Check 45 overdue days at an annual rate.
Invoice due date calculator
Add calendar-day terms to an invoice date.
- Who needs it
- Anyone issuing invoices on Net terms.
- Example
- Find the date 30 days after issue.
Payment terms calculator
Compare Net 7, 14, 30 and 60 due dates.
- Who needs it
- Businesses choosing or checking payment windows.
- Example
- Compare four terms from one issue date.
Tax and totals
Sales tax / VAT / GST calculator
Add tax to a net price or strip it out of a gross one.
- Who needs it
- Businesses using a percentage-based transaction tax.
- Example
- Find the tax included in a 1,080 total.
GST calculator
Add GST or extract it from an inclusive price.
- Who needs it
- Businesses operating in a GST system.
- Example
- Separate 15% GST from a gross total.
VAT calculator
Calculate net, VAT and gross amounts at your rate.
- Who needs it
- VAT-registered businesses and their customers.
- Example
- Add 20% VAT to a net price.
Pricing and profit
Profit margin calculator
Margin and markup from cost and selling price.
- Who needs it
- Anyone pricing jobs, services or products.
- Example
- Compare margin and markup on a 1,000 sale.
Discount calculator
Find the saving, reduced price and tax after discount.
- Who needs it
- Anyone offering a percentage reduction.
- Example
- Take 12.5% off a quoted price.
Markup calculator
Turn cost and markup into selling price and margin.
- Who needs it
- Trades, retailers and service businesses.
- Example
- Add 40% markup to a 500 cost.
Profit calculator
Subtract direct costs and overhead from revenue.
- Who needs it
- Small businesses reviewing a job or period.
- Example
- Find profit after 7,200 direct costs.
Break-even calculator
Find sales needed to cover fixed costs.
- Who needs it
- Businesses testing a price or sales target.
- Example
- Find units needed with 75 contribution.
Time and rates
Hourly rate calculator
Work back from target income, billable hours and costs.
- Who needs it
- Freelancers, consultants and contractors.
- Example
- Set a rate from 1,200 billable hours.
Billable hours calculator
Estimate utilisation and revenue from available time.
- Who needs it
- Freelancers, agencies and consultants.
- Example
- Remove admin time from 160 working hours.
Overtime calculator
Apply an overtime multiplier to extra hours.
- Who needs it
- Hourly workers, contractors and managers.
- Example
- Price six hours at time-and-a-half.
Everyday business
Percentage calculator
Calculate a share, ratio or percentage change.
- Who needs it
- Anyone checking pricing or performance figures.
- Example
- Measure the change from 240 to 800.
Revenue calculator
Project revenue from customers, value and frequency.
- Who needs it
- Freelancers and small business planners.
- Example
- Model 24 customers buying twice.
From calculation to document
Use these results as a check, then put the agreed figures into the invoice generator, quote generator or estimate generator. Tax treatment, payment rights and overtime rules vary, so each calculator asks you to supply the rate or term rather than inventing one.