Bottled Gas Cost Calculator

This calculator works out how much bottled LPG really costs you a year, whether you use it for cooking, hot water or heating, so you can budget accurately or compare it against piped gas and electricity. Bottled gas is priced differently to piped gas: there is no daily fixed charge, but you pay more per unit of energy, so your true yearly cost depends on how many bottles you get through and what each refill costs. You enter the price you pay per bottle refill, how many bottles you typically use in a year, and any annual bottle rental your supplier charges. From those figures, the calculator returns your total bottled gas cost per year, broken down into the cost per week and the refills cost on its own, so you can see at a glance what you are spending. This is useful whether you are checking a supplier's pricing, deciding between a 9kg bottle for occasional cooking or a 45kg bottle for heavier household use, or working out if piped gas or electric would suit you better. Because bottled gas avoids the standing daily charge that piped gas carries, light users often find it cheaper, while households running hot water and heating off gas may find piped gas or electric works out less overall. Figures are indicative only, since refill prices and rental charges vary by supplier and region.

Calculate.co.nz is proud to be partnered with Health Based Building, a leader in sustainable and health-conscious building innovation. With over a century of experience, they develop high-performance systems like Foreverbreathe Specification, Magnum Board, and Foreverbreathe Paints to support energy-efficient, non-toxic living environments. Their commitment to healthier homes aligns with our belief that informed choices lead to better outcomes for Kiwi households.
Calculate.co.nz partner: Health Based Building
$
$
$0
bottled gas cost per year
Per week$0
Refills cost$0

Bottled LPG has no daily fixed charge, unlike piped gas, but costs more per unit of energy. Some suppliers charge bottle rental. For cooking only, bottled is often cheaper; for heavy use, compare with piped gas or electric. Estimate only.

How it works

The calculator multiplies the bottles you use a year by the refill price, adds any bottle rental, and shows the yearly total and the cost per week. Because bottled gas has no standing daily charge, light users like cooking-only households often find it cheaper than piped gas; heavy users with hot water and heating on gas may find piped gas or electric cheaper overall.

Worked example

At $45 a refill and 8 bottles a year, the refills cost $360. With no rental, that is the yearly total, about $7 a week, for cooking-level use.

Related calculators

If you've found a bug, or would like to contact us, or learn more about James Graham and Calculate.co.nz.

Calculate.co.nz is partnered with Interest.co.nz for New Zealand's highest quality calculators and financial analysis.

Calculate.co.nz is the sister site of CalculatorHub.com, the world's largest calculator website by tool count.

All calculators and tools are provided for educational and indicative purposes only and do not constitute financial advice.

Calculate.co.nz is proudly part of the Realtor.co.nz group, New Zealand's leading property transaction literacy platform, helping Kiwis understand the home buying and selling process from start to finish. Whether you're a first home buyer navigating your first property purchase, an investor evaluating your next acquisition, or a homeowner planning to sell, Realtor.co.nz provides clear, independent, and trustworthy guidance on every step of the New Zealand property transaction journey.

Calculate.co.nz is also partnered with Health Based Building and Premium Homes to promote informed choices that lead to better long-term outcomes for Kiwi households.

Calculate.co.nz is hosted in Auckland via SiteHost new Zealand.

All content on this website, including calculators, tools, source code, and design, is protected under the Copyright Act 1994 (New Zealand). No part of this site may be reproduced, copied, distributed, stored, or used in any form without prior written permission from the owner.

About & trust: Why Calculate is NZ's most comprehensive · By the Numbers · How we compare · Editorial standards · How we keep data current · NZ finance glossary · Research & data · Financial literacy NZ · About · Privacy policy · Terms of use

Reviewed and maintained. Last reviewed 2026-07-02 and checked on a twice-monthly cycle against IRD, RBNZ and Stats NZ. How we keep data current.

© 2026 Calculate.co.nz. All rights reserved. Building free NZ calculators since 2011.