Calculators
Free invoice & receipt calculators
26 quick calculators for pricing, tax, late fees and accounts receivable — no signup, everything runs in your browser.
Create & Price
- Invoice CalculatorAdd tax and a discount to a subtotal and get the final invoice total.
- Hourly Invoice CalculatorTurn hours worked and an hourly rate into an invoice total, with tax.
- Contractor Invoice CalculatorAdd labor and reimbursable expenses to get a contractor invoice total.
- Project Invoice CalculatorWork out how much of a fixed project fee is due now vs. later.
- Markup CalculatorTurn a cost and a markup percentage into a selling price and profit.
- Margin CalculatorTurn a cost and selling price into profit and margin percentage.
- Freelance Rate CalculatorWork out the hourly rate you need to hit a target annual income.
- Billable Hours CalculatorSee what share of your hours are actually billable.
- Retainer CalculatorTurn an hourly rate and included hours into a monthly retainer fee.
Tax & Discounts
- Sales Tax CalculatorAdd sales tax to an amount, or pull it back out of a tax-inclusive total.
- VAT CalculatorAdd VAT to an amount, or pull it back out of a VAT-inclusive total.
- GST CalculatorAdd GST to an amount, or pull it back out of a GST-inclusive total.
- Invoice Discount CalculatorApply a percentage discount to a subtotal.
- Early Payment Discount CalculatorSee how much an early-payment discount is worth, and its annualized rate.
Payment Terms & Late Payments
- Invoice Due Date CalculatorAdd your payment terms to an invoice date to get the due date.
- Business Days CalculatorAdd business days, weekends excluded, to a date.
- Late Payment Fee CalculatorWork out a flat-percentage late fee on an overdue invoice.
- Late Payment Interest CalculatorCalculate interest owed on an overdue balance.
- Days Past Due CalculatorSee how many days an invoice is past its due date.
Accounts Receivable
- DSO CalculatorCalculate Days Sales Outstanding from receivables and credit sales.
- DSO Improvement CalculatorSee how much cash you'd free up by cutting your DSO.
- Accounts Receivable Turnover CalculatorMeasure how many times you collect your average receivables per period.
- Average Collection Period CalculatorWork out the average number of days it takes to collect receivables.
- AR Aging CalculatorBreak your receivables down by how overdue they are.
- Collection Effectiveness Index CalculatorMeasure how effectively you collect receivables against what was collectible.
- Bad Debt Percentage CalculatorWork out what share of credit sales became bad debt.