Learn

Plain-English guides to carbon credits, project development and verification, with clear routes into the relevant calculators and client-facing embed options.

Start with the right tool → See embed options
Guides
In-depth articles for carbon project developers and consultants
Standards

Carbon Registry Comparison

Gold Standard, Verra, Puro.earth and Plan Vivo compared on fit, buyer demand, timelines and commercial trade-offs.

~7 min read Read →
Markets

Carbon Credit Prices 2026

Fresh 2026 benchmark ranges by project type, with a live credit price guide embed and the key factors behind pricing.

~6 min read Read →
Foundations

How Carbon Credits Work

From project design to verified credit - the full lifecycle of a voluntary carbon credit, explained plainly. With live tools at each step.

~8 min read Read →
Standards

Gold Standard vs Verra VCS

Which standard is right for your project? Credit prices, eligibility, timelines, verification costs and buyer markets compared in detail.

~7 min read Read →
Costs

What Does Carbon Verification Actually Cost?

Real VVB fee ranges, registry charges and net revenue calculations for every major standard. Know your numbers before you commit.

~7 min read Read →
Cookstoves

What is fNRB? The Variable That Determines Your Cookstove Credit Yield

The fraction of non-renewable biomass - what it means, how MoFuSS works, and what values are credible in 2026.

~8 min read Read →
Project Design

How to Write a Carbon Project Design Document

The PDD sections, what validators look for, and the most common mistakes that delay registration by 6+ months.

~7 min read Read →
Fundamentals

Carbon Additionality - How to Prove Your Project Passes the Test

The three additionality tests, common failure modes, and how to build a defensible argument for GS and Verra projects.

~7 min read Read →
Biochar

Biochar Permanence - H/Corg Ratios and 100-Year Carbon Storage

How permanence is measured, tested and discounted in biochar carbon projects. Puro.earth classes and Verra VM0044 compared.

~7 min read Read →
Biochar

How Biochar Carbon Credits Work

A practical walkthrough from feedstock and pyrolysis through permanence, methodology choice and eventual credit issuance.

~6 min read Read →
Biochar

Biochar Project Economics and Viability

How volume, permanence, pricing and verification costs combine when you test whether a biochar project is commercially credible.

~6 min read Read →
Biochar

Which Biochar Methodology Route Fits Best?

Compare Puro-style removal routes, registry fit and buyer-facing trade-offs when choosing a biochar methodology path.

~6 min read Read →
Markets

What Determines Carbon Credit Prices?

Why credits range from £3/t to £120/t - the five pricing factors with 2026 benchmarks by project type and standard.

~6 min read Read →
Commercial

Carbon Project Feasibility

How to test volume, price, certification cost and break-even before you commit serious time or capital.

~6 min read Read →
Commercial

Carbon Credit Pricing by Project Type

How to use market ranges, quality signals and pricing scenarios more realistically when modelling project revenue.

~6 min read Read →
Planning

Net Zero Planning for Business

Move from a baseline footprint into a staged reduction pathway, residual emissions view and offset requirement.

~5 min read Read →
Water

How Safe Water Carbon Credits Are Calculated

Household reach, boiling displacement and commercial viability explained with a direct route into the calculator.

~5 min read Read →
Embeds

How to Embed a Carbon Project Map

Show your carbon portfolio on your site with a live map that updates from saved project data.

~5 min read Read →
Embeds

How to Embed a Carbon Impact Counter

Publish verified impact metrics in a clearer, more convincing format with an embeddable counter.

~5 min read Read →
Embeds

Embeddable Carbon Calculators Guide

A practical overview of embedding carbon calculators, counters and project displays on your own website.

~6 min read Read →
Tools
Free calculators - use them directly or embed them on your own site
Calculator

Biochar Carbon Calculator

Full biomass → biochar → tCO₂e chain. Gold Standard and Puro.earth aligned.

Open →
Calculator

Cookstove Credit Calculator

Gold Standard GS4GG (AMS-II.G) methodology for improved cooking projects.

Open →
Calculator

Solar Carbon Credit Calculator

Annual MWh, credits and revenue for grid-connected solar PV projects.

Open →
Calculator

Forestry & ARR Calculator

Verra VM0047 for afforestation and reforestation. Sequestration, buffer, leakage.

Open →
Calculator

Verification Cost Estimator

VVB fees, registry charges and net revenue by standard and credit volume.

Open →
Guide

Methodology Selector

Pick your project type and priority - get a ranked recommendation with explanation.

Open →
Calculator

Project Feasibility Modeller

Test volume, price, project life and break-even before taking a project any further.

Open →
Calculator

Credit Pricing Tool

Model revenue across price scenarios and stress-test how dependent the project is on premium outcomes.

Open →
Planner

Net Zero Planner

Translate a baseline footprint into a staged pathway, residual emissions view and offset requirement.

Open →
Calculator

Water Project Calculator

Estimate annual safe-water credit volume before connecting the project into feasibility and certification cost analysis.

Open →
Browse the docs, then use the supporting guides to see how project maps, impact counters, calculators and lead-generation widgets work in practice.
Open embed documentation
Guide

Embeddable Carbon Tools Guide

See where embeds fit, what users see, and how to choose between calculators, counters, maps and lead-generation widgets.