Simple spreadsheet tools that explain themselves
Free calculators you can use right now, and plain-English templates for the jobs that usually end up in a messy spreadsheet: paying off debt, tracking a rental, keeping a project or a small shop in order.
Free calculators
Debt snowball & avalanche calculator
See your debt-free month and how much interest each method costs.
Rental property cash flow calculator
Monthly cash flow, cap rate and cash-on-cash return from a few numbers.
Inventory reorder point calculator
When to reorder, how much safety stock to hold and the economic order quantity.
Templates
Each template is a one-time purchase on Gumroad with an instant download and a short quick-start guide.
Debt Snowball & Avalanche Payoff Planner (Excel)
Enter up to 10 debts, pick snowball or avalanche, and see your debt-free month, total interest and a month-by-month schedule. Built with functions Excel, LibreOffice and Google Sheets all support.
$9.99 · View on Gumroad
Printable Habit Tracker Pack (PDF, US Letter + A4)
Twelve monthly tracker pages, a year-at-a-glance page, a planner and a weekly review: print what you need, as often as you like.
$8.99 · View on Gumroad
Project Tracker & Gantt Chart (Excel)
Track up to 60 tasks; the workbook builds a dashboard and a Gantt chart and flags overdue work.
$11.99 · View on Gumroad
Rental Property Income & Expense Tracker (Excel)
One ledger for rent and bills; totals by property, month and category, ready for your own records or your tax preparer.
$9.99 · View on Gumroad
Small Shop Inventory & Reorder Tracker (Excel)
Log stock in and out; see current stock, what to reorder, what your stock is worth and your gross profit.
$4.99 · View on Gumroad
How this site works
The calculators run entirely in your browser: nothing you type is sent anywhere, and there are no cookies or trackers on this site. The templates are made by one small team, tested by recalculating them outside Excel, and described honestly, including their limits. Read the guides for the thinking behind the numbers.