GasIQ — Professional Gas Intelligence

Your gas did not change.
Your basis did.

GasIQ turns one natural-gas basis into defensible engineering and commercial outputs: flow, gas quality, emissions, blending, reforming estimates and reports.

1,000,000 scfto Nm³ with reference basis
$4/MMBtuto €/MWh with basis + FX
20 vol% H₂GCV / Wobbe / CO₂ impact

1. Define the Natural Gas

Input basis appears here. Fuel price and carbon price are entered on the relevant Result Builder cards.

Canonical flow-
Molecular weight-
GCV / HHV-
CO2 per day-

Select a typical gas mixture or choose Custom/Current to keep your entered composition.

Illustrative presets only. Replace with site chromatograph data for commercial use.

Selected composition: Custom / Current. Modified: No

Blending mode

Blending

Natural-gas blending and hydrogen-screening controls are available.

Gas Blend Builder Blend two streams · screen H₂ · evaluate GCV / Wobbe / CO₂ impact

Build a new gas here, then Apply it — every Result Builder card, report and export then uses it. Start from your active gas and either mix in a second stream or screen hydrogen addition.

1 Choose what you want to do

2 Set the recipe

Above ~10–20 vol% H₂, burner retuning is typically required. Screening only — not a safety, code or flame-stability assessment.

Advanced options

“Final mol / vol % shares” mixes by composition fraction. “Proportional stream flows” mixes by flow rate.

Custom mix-in composition

Use the exact component keys supported by the engine. Formula labels are display-only.

ComponentVol %Formula
Pick your gases above, then Preview first to see the impact before applying.

Hydrogen blending is for engineering/commercial screening only. It is not pipeline, burner, appliance, material, safety-code, NOx, flame-stability or regulatory approval.

Nm3 uses Normal. Sm3 uses Standard. scf, MSCFD and MMSCFD use US Standard. Actual m3 uses actual operating T/P/Z. Reference m3 uses the selected preset here.

Advanced reference conditions and Z factors

Ideal gas displays Z = 1. Manual preserves entered Z. Advanced AGA8 / ISO 12213 / GERG modes are client-side engineering-screening Z calculations and are not custody-transfer certification.

Normal

Standard

US Standard

Actual

Custom

Edit composition

Composition is hidden by default. Calculations use normalized mole fractions.

3. Result Builder

What do you want to do with this natural gas? Add only the cards you need; each card shows its calculation assumptions.

Validated Core

Defensible first answers

Flow, gas quality and emissions stay visible first because they are the highest-trust public product promise.

Commercial / FX

Opt-in price assumptions

Add a fuel price only when cost, budget or price-basis conversion is needed. FX and contract basis stay explicit.

Screening / Beta

Useful, clearly limited

Hydrogen blend screening and SMR steam demand are engineering estimates, not certification or design guarantees.

About the tool

A free natural gas calculator for engineers and commercial teams

GasIQ turns a single gas composition into the numbers people actually need: calorific value (HHV/GCV and LHV/NCV), Wobbe index, specific gravity and density, natural gas and hydrogen blending, CO2 and SO2 emissions, combustion air and flue gas, and gas-price conversion across energy and volume bases. Enter the gas once, then build only the results you need.

Gas quality

Gross and net calorific value, Wobbe index, relative density and molecular weight from your molar composition — on a consistent reference basis.

Blending & hydrogen

Blend two gases or screen hydrogen injection, and see how heating value, Wobbe and density shift against the base gas.

Emissions

CO2 intensity per unit energy and SO2 from sulfur content, for carbon screening and reporting.

Commercial

Convert gas price between currency, energy and volume units, estimate fuel cost flow and annual budget.

Frequently asked questions

What is the Wobbe index and why does it matter?

The Wobbe index is the gross calorific value of a gas divided by the square root of its specific gravity. It indicates how interchangeable two gases are at a burner: gases with a similar Wobbe index deliver roughly the same heat through the same orifice at the same pressure. It's a core gas-quality limit in most pipeline and appliance specifications.

What is the difference between HHV/GCV and LHV/NCV?

Higher (gross) heating value — HHV or GCV — counts the energy recovered when the water vapour in the combustion products condenses. Lower (net) heating value — LHV or NCV — assumes that water leaves as vapour, so it is lower. GasIQ reports both and lets you pick the basis for every result, so commercial and combustion figures stay consistent.

Can GasIQ calculate hydrogen blending into natural gas?

Yes. The Gas Blend Builder lets you mix natural gas with another gas stream or with hydrogen, then the Blend Impact card shows how calorific value, Wobbe index, density and CO2 intensity change versus the base gas — useful for screening hydrogen-blending and decarbonisation scenarios.

How does GasIQ estimate CO₂ emissions?

CO2 is calculated from the carbon in the gas composition via combustion stoichiometry, then expressed per unit of delivered energy (for example kg CO2 per MMBtu or per MWh) so you can compare fuels and blends on a like-for-like basis.

Is GasIQ suitable for custody transfer or fiscal metering?

No. GasIQ is an engineering and commercial screening tool. For custody-transfer or fiscal measurement, use a calibrated AGA-3 or ISO-5167 flow computer with certified gas analysis. GasIQ is built for fast decisions, comparisons and estimates — not certified billing.

Is GasIQ free to use?

Yes — GasIQ runs entirely in your browser and is free to use. Nothing you enter is uploaded; gas compositions, prices and reports stay on your device.