sourcedtools.com — small tools built on official public data
sourcedtools.com is a set of small, single-purpose web tools. Each one does one job — a calculation, a lookup, a conversion — using data published by an official source, and shows where every number comes from and when it was retrieved.
The tools are free to use, need no account and set no cookies. They are informational: check anything important against the official source linked on each page.
Read how this site is built, the privacy note and the disclaimer.
Tools
- Electricity cost calculator by state — Estimate the monthly electricity cost of an appliance or household with the EIA average…
- GS Pay Calculator — Look up General Schedule annual and hourly pay by year, grade, step and locality from…
- I Bond Value Calculator: Composite Rate and Value by Month — Estimate a Series I savings bond value by month with the 31 CFR Part 359 formulas and…
- Federal Income Tax Bracket Calculator — Federal income tax on taxable income from the IRS tax rate tables for 2025 and 2026…
- METAR & TAF toolkit: fetch and decode current reports — Fetch current METARs and TAFs from the AviationWeather.gov Data API and decode each group.
- IRS mileage deduction calculator: business, charity, medical and military… — Multiply business, charity, medical or military moving miles by the IRS standard mileage…
- GSA per diem lookup and trip allowance calculator — Look up FY2027 GSA per diem lodging and M&IE rates for CONUS destinations and compute…
- Regional CPI inflation calculator: adjust dollars with BLS CPI-U by region or… — Adjust a dollar amount between two months using the CPI-U for a chosen US region or metro, with the series id and values shown
- Self-employment tax calculator (Schedule SE, Form 1040) — Figure self-employment tax and the one-half deduction with Schedule SE (Form 1040), tax…
- Median household income by state — Median household income by state from U.S. Census Bureau Table H-8, 1984 to 2025, in…
- State minimum wage pay calculator — Weekly and annual gross pay at the state minimum wage, from the U.S. Department of Labor…