# WBcalc

> WBcalc provides free, model-specific aircraft weight and balance calculators and technical guides for light aircraft. Calculator pages publish model/configuration data, loading stations, center-of-gravity limits, fuel data, source notes, and an interactive calculation tool; aircraft-specific empty weight values should be verified against the current record for the individual aircraft.

## Aircraft calculators
- [All aircraft](https://wbcalc.com/aircraft/): Complete index of model-specific calculators.
- [Cessna](https://wbcalc.com/cessna/): Cessna calculators and model families.
- [Piper](https://wbcalc.com/piper/): Piper calculators and PA-28 family.
- [Diamond](https://wbcalc.com/diamond/): Diamond DA20 and DA40 calculators.
- [Mooney](https://wbcalc.com/mooney/): Mooney M20 calculators.
- [Grumman](https://wbcalc.com/grumman/): Grumman/American General calculators.
- [Beechcraft](https://wbcalc.com/beechcraft/): Beechcraft Bonanza calculators.

## Weight and balance guides
- [Aircraft weight and balance](https://wbcalc.com/weight-and-balance/): Weight, arm, moment and loading workflow.
- [Aircraft center of gravity](https://wbcalc.com/aircraft-center-of-gravity/): Center-of-gravity concepts and calculation.
- [CG envelope](https://wbcalc.com/cg-envelope/): Forward/aft limits and envelope interpretation.
- [Aircraft moment](https://wbcalc.com/aircraft-moment/): Moment formula and use in weight and balance.
- [Basic empty weight](https://wbcalc.com/basic-empty-weight/): Aircraft-specific empty weight and arm.
- [Aircraft fuel weight](https://wbcalc.com/aircraft-fuel-weight/): Fuel quantity, weight and moment.

## Data and site information
- [Data methodology](https://wbcalc.com/data-methodology/): How aircraft data is sourced, represented and checked.
- [About WBcalc](https://wbcalc.com/about/): Purpose and scope of the site.
- [Contact](https://wbcalc.com/contact/): Contact and data-correction information.
- [Sitemap](https://wbcalc.com/sitemap.xml): Canonical public HTML URLs.

## Important usage note
WBcalc is a planning and calculation aid. The approved POH/AFM, current aircraft weight and balance record, equipment list, supplements, serial-number applicability and other approved documents remain authoritative for the individual aircraft.