Free tools
Free business and finance calculators
Percentages, VAT, margins, loan repayments, cash runway and long-run investment costs. Every tool works without an account, an email address or a trial period.
21 tools
- Investing
Average Purchase Price Calculator
Work out the weighted average price across multiple purchases, including optional transaction fees.
- Business finance
Business Loan and Commercial Mortgage Calculator
Calculate repayments, total interest and an amortisation schedule for a business loan or property mortgage.
- Business finance
Cash Runway Calculator
Estimate monthly net burn, how many months of runway remain and the projected zero-cash date.
- Compliance
Cross-Border Compliance Checker
Identify VAT, EORI, OSS/IOSS or EPR topics that may be worth investigating.
- Percentage and tax
Discount Calculator
Calculate a discounted price, the original price before a discount, or the discount percentage applied.
- Investing
Dividend Income Calculator
Estimate gross dividend income from a yield or from a share count and dividend per share.
- Compliance
Does My Company Need an LEI?
Answer a few questions to see whether a broker or financial institution may request an LEI.
- Investing
Drawdown Recovery Calculator
See the gain required to recover from a portfolio decline of a given percentage.
- Investing
Investment Comparison Calculator
Compare two investment scenarios side by side and see which assumptions drive the difference.
- Investing
Investment Fee Impact Calculator
Compare the same investment with and without annual fees to see the long-term cost of charges.
- Investing
Investment Growth Calculator
Project how a company or personal investment could grow from contributions, an assumed return and fees.
- Compliance
ISO Quote Scope Builder
Organise the information a certification or readiness provider may need to prepare a quote.
- Compliance
ISO Readiness Checker
Review the general foundations commonly considered when preparing for ISO certification.
- Business finance
Lease vs Buy Calculator
Compare the nominal and present-value cost of leasing an asset against buying it outright or on finance.
- Business finance
Margin and Markup Calculator
Convert between cost, selling price, gross margin and markup, including target-margin pricing.
- Percentage and tax
Percentage Calculator
Work out a percentage of a value, what percentage one number is of another, and percentage change.
- Investing
Portfolio Rebalancing Calculator
Compare current and target allocations across holdings and see the buys and sells that close the gap.
- Investing
ROI and CAGR Calculator
Calculate total return, ROI percentage and compound annual growth rate between two values.
- Percentage and tax
Sales Tax Calculator
Add sales tax to a pre-tax price or remove it from a tax-inclusive total using your own rate.
- Percentage and tax
VAT Calculator
Add VAT to a net price or remove VAT from a gross price, with editable country rate presets.
How these tools work
The maths runs in your browser. Nothing you type is stored, sent to a server or passed to analytics, and no calculator asks for a contact detail before it gives you an answer.
A calculator is only as good as the assumptions you feed it. Tax rates, investment returns and financing terms differ by product, transaction and country, so treat the output as a first estimate rather than a decision. Nothing here is legal, tax, accounting or investment advice.
Some tool pages link to compliance services delivered by independent providers. StandardsDesk may earn a referral fee on those introductions; the calculators themselves stay free either way.