GS1 SSCC-18 logistics-unit validator - check digit, payload and serial reference

Package dimensional weight calculator - volume, dimensional weight and billable weight

Pallet count planner from unit count and units per pallet - pallets, unused capacity and utilization

Archaeological and heritage site lookup - description, country, coordinates, designations and links (Wikidata)

XIRR calculator for irregular dated cash flows - annualized return and net cash flow

Childcare subsidy net-cost calculator - net monthly and annual cost after subsidy and tax credit

Loan-to-value calculator - LTV percentage, equity amount and equity percentage

Childcare cost estimate - weekly, monthly, annual and per-child from hours, hourly rate and child count

Fixed-rate mortgage calculator - monthly payment, total paid and total interest

Childcare staffing ratio calculator - children per adult and adults per child

Property cap rate calculator from net operating income and value

Tap target size checker from width, height and spacing - WCAG threshold flags

WCAG contrast ratio calculator for two sRGB colors - luminance, ratio and AA/AAA flags

Planting density estimator from area and row spacing - estimated plant positions

BMI calculator from weight, height and age - exact and rounded BMI

CSS rem to pixels converter from root font size and rem value

Weighted grade calculator from score and weight arrays

GPA calculator from grade-point and credit-hour arrays - quality points, credits and GPA

Final exam score-needed calculator from current score, target and exam weight

Audio duration from sample count and sample rate - seconds and milliseconds