Free Business Calculators
Essential calculators for UK freelancers and small businesses. No signup required - just useful tools to help you run your business.
VAT Calculator
Add or remove VAT from any amount. Calculate VAT at standard (20%), reduced (5%), or custom rates for UK businesses.
Late Payment Interest Calculator
Calculate statutory interest and fixed compensation for overdue B2B invoices under UK law. Updated for 2026 reforms.
CIS Deduction Calculator
Calculate Construction Industry Scheme deductions at 20% or 30%. Separate labour from materials for accurate CIS invoices.
DSO Calculator
Calculate your Days Sales Outstanding to understand how quickly you're collecting payments from customers.
Hourly Rate Calculator
Calculate what hourly or day rate you should charge as a freelancer based on your income goals and expenses.
Invoice Generator
See what a professional UK invoice should include. Enter your details and preview a live invoice layout instantly.
Profit Margin Calculator
Calculate gross profit, profit margin %, and markup %. Reverse-calculate the price to charge for any target margin.
Need More Than Just Calculators?
Experi automates your entire invoicing process. Create professional invoices, track payments, and get paid faster - all in one place.