CALCULATORS BY SUBJECT

General business calculators

Plan workload, resource use and business tradeoffs with simple models you can inspect and change.

7 free tools. No signup. Methods, examples and source links on every page.

Water Leak Cost

Turn a measured or assumed constant leak rate into volume, avoidable water and sewer charges, and a simple repair recovery ratio.

Use water leak cost →

Renewable Generation Value

Split entered generation into on-site use and export. Show export income separately from avoided grid purchases.

Use renewable generation value →

Solar Simple Payback

Calculate annual value from supplied self-use and export quantities, then compare positive net savings with net installed cost.

Use solar simple payback →

Before you use these calculations

State what decision the result will support and what costs belong in that decision.

Use a common workload and period when comparing alternatives. Add noncash time values separately from payments.

Test an alternative scenario and keep the assumptions with the result you export.

Start with the example, replace the assumptions with your measurements, then change one input to see its effect. Save or export the scenario if you need to keep its basis.

How Case calculators are built and checked →

Read practical calculation guides or browse another industry.