{"available":true,"inputs":{"mass":1000,"mass_unit":"kg","mass_tonnes":1,"distance_km":500,"mode":"road","sub_mode":"HGV (all types, average laden)","region":"uk","basis":"wtw"},"tonne_km":500,"factor":{"id":"defra_hgv_avg","mode":"road","sub_mode":"HGV (all types, average laden)","authority":"UK DEFRA / DESNZ — Greenhouse gas reporting: conversion factors","edition":"2026","region":"uk","unit":"kgCO2e/tonne-km","wtw":0.12715,"ttw":0.10356},"emissions":{"wtw_kgco2e":63.575,"ttw_kgco2e":51.78,"primary_kgco2e":63.575,"basis_used":"wtw"},"mass_basis":"actual_gross_mass","empty_running":"sector_average_included","representativeness":"medium","confidence":"medium — fleet-average factor representative for the mode","summary":"63.575 kgCO2e WTW for 1 t × 500 km by road (UK DEFRA / DESNZ — Greenhouse gas reporting: conversion factors 2026 fleet-average factor). Uses ACTUAL GROSS MASS, not chargeable/volumetric weight. Fleet-average empty running is already included — do not add a separate empty-return leg.","methodology":"ISO 14083:2023 / GLEC Framework v3.2","disclaimer":"Best-effort estimate computed using the ISO 14083 / GLEC distance-based method with published open emission factors (DEFRA, EPA, ADEME). Reference + computation only — NOT a verified or audited carbon report, not legal advice, and not a regulatory determination. Factors are fleet/sector averages and load assumptions vary; use actual gross mass (not chargeable/volumetric weight) and verify against the current source before reporting.","_source":{"type":"methodology","standard":"ISO 14083:2023 / GLEC Framework v3.2","reference":"ISO 14083 / GLEC v3.2 — DEFRA 2026 + EPA 2024 + ADEME Base Carbone (open factors)","source_url":"https://www.freightutils.com/methodology","computed_by":"freightutils.com","factor":{"authority":"UK DEFRA / DESNZ — Greenhouse gas reporting: conversion factors","edition":"2026","value":0.12715,"unit":"kgCO2e/tonne-km","basis":"wtw","last_verified":"2026-06-26","source_url":"https://www.gov.uk/government/publications/greenhouse-gas-reporting-conversion-factors-2026","licence":"Open Government Licence v3.0"}}}