About HomeCostGuru

HomeCostGuru is a free collection of calculators for homeowners, renters and DIYers. We focus on the questions people ask before a project: how much material to buy, what it will cost, and how much energy an appliance uses. Our goal is simple, honest tools that work well on a phone in the store aisle.

How we build our calculators

Every calculator uses a published formula that we show on the page, so you can check the math yourself. Where a tool uses prices or rates, we name the source (for example the U.S. Energy Information Administration) and the date of the data. When the source publishes new numbers, the site is updated.

Our promise

• Free to use, no sign-up.
• Formulas shown on every page.
• Sources and dates listed for all data.
• Corrections welcome — tell us if something looks wrong.