Money and planning
Free business calculators
Calculate GST, margin, markup, break-even, loan payments, project costs and other business planning figures.
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Money & business
GST calculator
Add GST to a net price or remove included GST from a total. Enter the rate that applies to your supply.
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Profit-margin calculator
Find gross profit, margin on selling price and markup on cost.
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Markup calculator
Set a selling price from your cost and desired markup.
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Discount calculator
Calculate the saving and final price after one percentage discount.
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Break-even calculator
Estimate the units and sales needed to cover fixed and variable costs.
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Business-loan EMI calculator
Estimate a fixed-rate loan payment and total interest over monthly instalments.
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Late-payment interest calculator
Estimate simple interest for a user-specified overdue period and annual rate.
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Freelance-rate calculator
Turn an annual income target, overhead and billable capacity into an hourly rate.
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Project-cost estimator
Combine labour, materials, outside services and a contingency allowance.
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Salary-cost calculator
Estimate employer cost from gross salary, employer contributions and benefits.
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Start with the destination requirement
These calculators make the formula visible and let you test assumptions quickly. Treat the result as a planning estimate: use consistent currency and periods, verify tax or finance rules, and keep source inputs with the decision.
- Keep the original file or source figures.
- Check every generated result before using it.
- Follow the current official or contractual requirement.
Practical guides
Learn the workflow, not just the button
Profit margin vs markup: why the same percentage gives different prices
Calculate margin and markup from a $75 cost, then check what a discount does to gross profit.
How many jobs cover your costs? A break-even example
Estimate the jobs required to cover a month of fixed costs, and see when a break-even answer is impossible.