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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.
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Late Payment Interest Calculator
Calculate statutory interest and compensation for overdue B2B invoices under UK law. Know your rights.
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DSO Calculator
Calculate your Days Sales Outstanding to understand how quickly you're collecting payments from customers.
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Hourly Rate Calculator
Calculate what hourly or day rate you should charge as a freelancer based on your income goals and expenses.
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More Tools Coming Soon
CIS Deduction CalculatorInvoice Number GeneratorProfit Margin Calculator
Need More Than Just Calculators?
Experi automates your entire invoicing process. Create professional invoices, track payments, and get paid faster—all in one place.