The Stack Matrix / Free business tools
Calculate, share, and revisit your business assumptions.
Use the same quick calculators as our browser extension. Review break-even units, per-unit profit margin, markup, target selling price, or fixed-rate loan costs. A shared link restores the sender's inputs; results are recalculated, not independently verified. No account is required.
Break-even
Units needed to cover fixed costs for the period you model. Amounts are USD.
Planning estimate
- Break-even units (rounded up)
- 334
- Revenue at rounded units
- $16,700.00
- Contribution per unit
- $30.00
Calculation and assumptions
Contribution per unit = selling price - variable cost. Break-even units = ceiling(fixed costs / contribution). Revenue = rounded units x selling price.
Fixed costs and sales use the same reporting period. Whole units are rounded up. Constant selling price and variable cost per unit.
Planning estimate only. USD amounts. Taxes, fees, discounts, and other costs not entered are excluded. Results are not financial advice or guaranteed outcomes.
Share with a partner, client, or accountant
Inputs are encoded in the link fragment (after #), not uploaded as a saved scenario. They are visible to recipients and may remain in browser history. Copying does not publish or send the report.
Turn a quick answer into an ongoing plan
Keep using these free tools without an account. Paid kits add advanced analysis and unlimited saved scenarios in your signed-in workspace. Business OS connects Finance, Pricing, Sales, and Marketing planning with saved workspaces and regular reviews. A shared link does not grant paid access or save work to an account.