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 CalculatorWork out an invoice total with a percentage or fixed discount, tax, shipping and any deposit already paid.
- Hourly Invoice CalculatorTurn hours worked into an invoice total, with overtime pay, tax and reimbursable expenses.
- Contractor Invoice CalculatorPrice a contractor invoice: labor, marked-up materials, expenses, tax and retainage withheld.
- Project Invoice CalculatorSplit a fixed project fee into a deposit and installments, with tax and a full payment schedule.
- Markup CalculatorGet a selling price from cost and markup, plus the margin it gives you, price with tax and totals for a quantity.
- Margin CalculatorFind your gross margin from cost and price — or the price you need to hit a target margin.
- Freelance Rate CalculatorFind the hourly and day rate you need to take home your target income after tax, expenses and time off.
- Billable Hours CalculatorMeasure your utilization, billable revenue and how far you are from your target.
- Retainer CalculatorPrice a monthly retainer with a commitment discount and see the effective rate and contract value.
Tax & Discounts
- Sales Tax CalculatorAdd US-style sales tax (state + local) to a price, or pull it out of a tax-inclusive amount.
- VAT CalculatorAdd VAT to a net price, or extract VAT from a VAT-inclusive amount.
- GST CalculatorAdd or remove GST, with an optional provincial PST/QST shown separately.
- Invoice Discount CalculatorApply a percentage or fixed discount to an invoice, then tax, and see the effective discount.
- Early Payment Discount CalculatorSee the deadlines, savings and true annual return of an early-payment discount like 2/10 net 30.
Payment Terms & Late Payments
- Invoice Due Date CalculatorFind an invoice's due date for Net, end-of-month (EOM) or due-on-receipt terms, with weekend handling.
- Business Days CalculatorAdd business days to a date, or count the business days between two dates — minus holidays.
- Late Payment Fee CalculatorCalculate late fees charged monthly, weekly, daily or once — by dates or number of periods, with compounding, grace period and a cap.
- Late Payment Interest CalculatorCalculate interest on an overdue invoice from dates or days, with annual or monthly rates and simple, monthly or daily compounding.
- Days Past Due CalculatorSee how many calendar and business days an invoice is past due, and which aging bucket it falls into.
Accounts Receivable
- DSO CalculatorCalculate Days Sales Outstanding, plus best-possible DSO and average days delinquent.
- DSO Improvement CalculatorSee how much cash you free up — and interest you save — by collecting faster.
- Accounts Receivable Turnover CalculatorCalculate your receivables turnover ratio from beginning and ending AR, and the days it implies.
- Average Collection Period CalculatorFind the average number of days it takes to collect, and how far that is beyond your payment terms.
- AR Aging CalculatorBreak overdue receivables into aging buckets and estimate the bad-debt allowance you need.
- Collection Effectiveness Index CalculatorMeasure how much of what you could collect in a period you actually collected, with a rating.
- Bad Debt Percentage CalculatorCalculate your bad-debt percentage net of recoveries, and project next period's bad debt.