Free calculators
One calculator per book, three ways: use it right here in your browser, open it in Google Sheets, or download it for Excel. Enter the money and the output; it does the arithmetic.
No sign-up. The online version saves in your browser and sends nothing anywhere. The spreadsheets are formulas only, no macros.
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Cost Per Egg calculator
Enter the coop, the chicks, the feed, and the eggs. It gives you cost per egg this month and lifetime, the store comparison, and how many eggs you need before the flock breaks even.
Use the online calculator Google Sheets version coming soon Download for Excel (.xlsx) About the book
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Cost Per Tomato calculator
Enter the beds, the soil, the seeds, and the harvest. It gives you cost per tomato and per pound, the store comparison, and how many pounds you need before the garden breaks even.
Use the online calculator Google Sheets version coming soon Download for Excel (.xlsx) About the book
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Cost Per Nautical Mile calculator
Enter the purchase, the invoices, and the trips. It gives you cost per nautical mile and per hour, with and without the purchase price, against a rental rate.
Use the online calculator Google Sheets version coming soon Download for Excel (.xlsx) About the book