Business calculators for small businesses
263 free calculators for the money questions you hit every day: what to charge, what a platform takes, what an employee costs.
Pricing & profit
Margin, markup, discounts and the price you need to make money.
- Percentage Calculator
- Invoice Generator
- Percentage Increase Calculator
- Margin Calculator
- Percent Change Calculator
- Percent Off & Discount Calculator
Seller & payment fees
What eBay, Etsy, PayPal, Stripe and other platforms take from each sale.
- eBay Fee Calculator
- PayPal Fee Calculator
- Amazon FBA Calculator
- Etsy Fee Calculator
- Shopify Fee & Profit Calculator
- Depop Fee Calculator
Sales tax & VAT
Add or remove sales tax and VAT from any price.
- Sales Tax Calculator
- Reverse Sales Tax Calculator
- Car Sales Tax Calculator
- VAT Calculator
- Sales Tax Nexus Calculator
- Texas Car Sales Tax Calculator
Marketing
CPM, ROAS, conversion rate, customer value and acquisition cost.
- CPM Calculator
- Avery 5160 Label Template
- ROI Calculator
- Customer Lifetime Value Calculator
- Engagement Rate Calculator
- CTR Calculator
Time & payroll
Time cards, hours, overtime, salary to hourly and employer costs.
- Date Calculator
- Time Card Calculator
- Hours Worked Calculator
- Annual Income Calculator
- Take-Home Pay Calculator
- California Paycheck Calculator
Self-employed & tax
Self-employment tax, quarterly payments, rates and deductions.
- Quarterly Estimated Tax Calculator
- Freelance Hourly Rate Calculator
- 1099 Tax Calculator
- Self-Employment Tax Calculator
- E&O Insurance Cost Calculator for Consultants
- Mileage Reimbursement Calculator
Business finance
Loans, depreciation, NPV, IRR, cash flow and business ratios.
- Compound Interest Calculator
- Savings Calculator
- Future Value Calculator
- APY Calculator
- APR Calculator
- Loan Payoff Calculator
Inventory
Reorder points, order quantities, turnover and cost of goods.
- Cost of Goods Manufactured Calculator
- COGS Calculator
- Inventory Carrying Cost Calculator
- Inventory Turnover Calculator
- EOQ Calculator
- Reorder Point Calculator
Restaurant
Food cost, pour cost, prime cost and menu prices.
- Tip Calculator
- Food Cost Calculator
- Menu Price Calculator
- Recipe Cost Calculator
- Pour Cost Calculator
- Restaurant Tax Calculator
Contractors & trades
Material quantities, job costs and bid prices for concrete, gravel, paint, roofing, flooring and more.
- Concrete Calculator
- Square Footage Calculator
- Gravel Calculator
- Mulch Calculator
- Square Meters to Square Feet Converter
- Paint Calculator
Shipping & logistics
Freight class, dimensional weight, fuel surcharges, cost per mile and cash counts.
- Money Counter (Cash Drawer Calculator)
- Avery 5160 Label Template
- Freight Class Calculator
- Moving Cost Calculator
- Avery 5163 Label Template
- Dimensional Weight Calculator
How smbcalc works
- The working is shown. Every calculator explains its formula step by step, with a worked example you can check by hand.
- Rates come from official sources. Tax rates, fees and legal limits link to the IRS, state agencies or the platform's own fee page, with the date we last checked them.
- Your numbers stay with you. The maths runs in your browser. There's no account and nothing to sign up for.
Read how we check our numbers or who runs smbcalc.