Free Business Calculators

30 free calculators for small business owners. No signup required. Enter your numbers, see the math, make better decisions.

Profitability

Break-Even Calculator

How many units or how much revenue do you need to cover all costs?

Profit Margin Calculator

See your gross, operating, and net margins in one view.

Gross Profit Calculator

Are you making enough on each sale before overhead?

Markup vs Margin Calculator

Convert between markup and margin — they're not the same thing.

Margin Erosion Calculator

Find the gap between what you quoted, billed, and actually kept.

Pricing Adequacy Calculator

Is your pricing good enough to cover costs and target margin?

Cash Flow

Cash Runway Calculator

How many months until the cash runs out?

Burn Rate Calculator

How fast are you spending cash? See gross and net burn.

Working Capital Calculator

Can you pay your bills for the next 90 days?

Quick Ratio Calculator

The acid test — can you cover obligations without selling inventory?

Sales & Marketing

CAC Calculator

How much does it cost to win a new customer?

Customer Lifetime Value Calculator

How much is each customer really worth over time?

LTV:CAC Ratio Calculator

The benchmark is 3:1 — where do you stand?

ROAS Calculator

Is your advertising actually profitable after margins?

Costs & Overhead

Employee Cost Calculator

The real cost is 1.25-1.4x the salary. Here's the math.

Hourly Rate Calculator

What should you actually charge per hour?

Overhead Rate Calculator

Know your overhead as a percentage of revenue and labor.

Inventory Turnover Calculator

How fast are you selling through your stock?

Loans & Funding

Business Loan Calculator

What will this loan actually cost you? Monthly payment and total interest.

DSCR Calculator

The number your lender cares about more than your credit score.

Startup Cost Estimator

Estimate total startup costs — most businesses underestimate by 30-50%.

Revenue & Growth

MRR Calculator

Track monthly recurring revenue, growth rate, and ARR.

Churn Rate Calculator

A 5% monthly churn means you lose half your customers every year.

Revenue Per Employee Calculator

Measure team efficiency and compare to industry benchmarks.

Collections & Payables

DSO Calculator

How long does it take to collect payment?

AP Turnover Calculator

Paying too fast burns cash. Paying too slow burns relationships.

Taxes & Risk

Tax Reserve Calculator

How much should you set aside for taxes?

Customer Concentration Calculator

Are you too dependent on one customer?

Investment Analysis

ROI Calculator

What's the return on this investment?

Payback Period Calculator

How long until this investment pays for itself?

Want These Numbers Tracked Automatically?

Omnyra connects to your QuickBooks and monitors these metrics in real-time. No more spreadsheets.

Learn About Omnyra