Home / Calculators and data
Calculators and market data
Everything here is free and needs no account. Work out what you hold, what you owe, and what the market has done.
Calculators
Each one shows its working and cites the published table or regulation behind the number.
Forest units Carbon TrackerUnits your forest has earned to date, from the official default carbon tables.
Farm emissionsAn on-farm profile by stock numbers and fertiliser, from the published national factors.
ETS obligationsUnits to surrender for waste, coal, natural gas, HFCs and liquid fuels.
Industrial allocationAn indicative entitlement from the statutory formula and prescribed baselines.
Emissions estimatePick any published factor, enter a quantity, get tonnes of CO2e.
Fee estimatorWhat a sale or purchase on Carbon Trader costs, before you commit.
Market data and history
Published figures with their sources, kept up to date.
NZU reference priceThe daily indicative market reference, with its source and date.
ETS auction historyEvery government auction since 2021: clearing prices, volumes and outcomes.
ETS company dataWhat each ETS participant reported, by activity and year. Searchable.
Emission factor catalogueAll 902 published New Zealand emission factors in one searchable list.
Credit types explainedNZUs and other carbon credits: what each one can and cannot be used for.
NoticesPlatform notices and market announcements.
Guides and market updatesPlain-English explainers on NZUs, auctions, settings and settlement.
APIs
The same data, for your own spreadsheets and systems.
Emission factors API FreeSearch the catalogue and run estimates. No key needed.
Daily reference API FreeThe NZU reference and the Carbon Trader daily benchmark.
Enterprise APIListings, fees, evidence and webhooks for approved systems.
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Want it saved and kept up to date?
Carbon Tracker® keeps your numbers
The calculators here give a one-off answer. Carbon Tracker saves your blocks, stock and readings, and keeps your units and obligations current. When you have units to sell, they list here.