Free working samples
Two real spreadsheets, free, no email or sign-up. Open them, click the cells, read the formulas, and decide if the full templates are worth it.
Trucking: IFTA and fuel cost-per-mile tracker
One sheet. Log each fuel stop and your miles by state; it works out fleet MPG, taxable gallons by state, net IFTA tax due or credit, and fuel cost per mile. It ships blank: you enter your own state tax rates, so nothing here goes out of date.
Checked: recalculated with no error cells and compared with a hand calculation (fleet MPG 4.06 and fuel cost per mile $0.992 on the example data). Works in Excel and opens in Google Sheets. Prefer a browser? Use the free IFTA calculator.
Want the full set (bookkeeping, IFTA, per diem, tax set-aside)? Owner Operator Bookkeeping Workbook with IFTA and Cost Per Mile, $28.
Network: subnet quick-planner
Enter any IPv4 address and prefix. It shows the network and broadcast addresses, subnet and wildcard masks, first and last usable host and host count, splits the network into equal subnets, and tells you the smallest prefix that fits a host count. It also tests itself against a worked example.
Checked: recalculated in LibreOffice and compared with Python's ipaddress module on five different networks (/20, /24, /26, /29, /30); every result matched. No macros, nothing protected. Equal splits only; IPv4 only. Prefer a browser? Use the free subnet and VLSM calculator.
Need different-sized subnets and overlap checks? IPv4 VLSM Subnet Planner Spreadsheet, $19.
Free calculators
- IFTA Fuel Tax Calculator
- Cost Per Mile and Break-Even
- Per Diem Calculator
- IPv4 Subnet and VLSM Calculator
- PoE Power Budget Calculator
- UPS Runtime Calculator
- Homelab Electricity Cost Calculator
- Bandwidth Oversubscription Calculator
The samples are drafted with AI assistance and checked as described on the methodology page. They are planning aids, not tax or engineering advice.