Local tools. Clear rules.
Useful tools for Australia, the United States, and Europe—with official sources, effective dates, and a clear explanation of what each result covers.
Rules checked November 11, 2026. Tools are independent estimates or format checks, not government services or professional advice. Verify the applicable jurisdiction and current rule before relying on a result.
Australia
Australian business identifiers and the 2026–27 super guarantee.
Australian ACN Format & Checksum Checker →
Check nine-digit Australian company numbers for typing errors while preserving leading zeroes.
Australian ABN Format & Checksum Checker →
Check an 11-digit ABN for typing errors using the official modulus-89 checksum.
Australian Super Guarantee Estimator (2026–27) →
Estimate 12% minimum SG from qualifying earnings, including the 2026–27 annual contribution base.
United States
Date-aware 2026 mileage estimates and basic federal overtime math.
US Mortgage Extra-Payment Planner →
Compare modeled mortgage interest and payoff months with recurring extra principal; download both schedules as CSV.
US Auto Loan Offer Comparison →
Compare two loan rates and terms using the same car price, quoted charges, down payment and trade-in equity.
Medicare Initial Enrollment Window Planner →
Find the standard age-65 seven-month Part A/B enrollment window, including first-of-month birthdays.
US Federal Holiday Calendar & Download →
View verified 2026–2028 OPM observed holidays and download calendar (.ics) or CSV files.
US Passport Mail-Renewal Checklist →
Review standard DS-82 mail-renewal criteria without entering a passport number, name or date of birth.
US Federal FOIA Request Draft Builder →
Draft a focused federal records request with a date range and explicit fee limit; download and submit it yourself.
USPS Priority Mail Dimensional Weight Calculator →
Estimate chargeable pounds for rectangular domestic retail Priority Mail parcels under the July 2026 rules.
US Mileage Log & Calculator (2026) →
Apply the correct 2026 IRS rate to dated business, medical, and charity trips; export a CSV log.
US Federal Overtime Estimator →
Estimate a simple hourly workweek with time-and-a-half after 40 hours under the federal FLSA rule.
Europe
Schengen short-stay planning and EU consumer deadline estimates. These rules do not apply to every European country or situation.
EU Pet Primary Rabies Waiting-Date Planner →
Work out the standard 21-day wait after a completed primary rabies vaccination for a dog, cat or ferret.
Schengen 90/180-Day Stay Planner →
Check a proposed short stay against the rolling 90 days in any 180 days rule, with a daily CSV plan.
EU Online Goods Cooling-off Deadline Estimator →
Estimate the 14-day withdrawal-notice deadline for qualifying EU distance-purchase goods, with holiday inputs.