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Utilvibe

Free sustainability and energy calculators for carbon, EV, solar, and household electricity decisions.

Most used tools

Plan cleaner energy and lower everyday impact

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Carbon Footprint

Estimate annual CO2e across home energy, transport, flights, diet, and waste with transparent assumptions.

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EV Savings & Solar

Compare gas spending with home and public EV charging costs, solar offsets, and simple payback.

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Solar & Payback

Estimate solar payback period, lifetime savings, incentives, battery impact, and CO2 offsets.

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Appliance Cost

Estimate how much your fridge, AC, or TV costs to run. Simple breakdown of daily, monthly, and yearly energy consumption.

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More calculators

Other planning tools

Helpful when your planning extends beyond energy, from work pricing to long-term savings and wellness basics.

Freelance Rate

Hourly, day, and project pricing for independent work.

Retirement Savings

Compound growth, inflation, and withdrawal assumptions.

TDEE & Sleep

Calories, macro targets, and sleep-cycle windows.

Guides

Learn the assumptions behind the calculators

How to Calculate Carbon Footprint

A plain-English guide to activity inputs, emissions factors, and why carbon estimates vary.

EV vs Gas Cost Guide

Understand the fuel, charging, solar, and payback assumptions behind EV savings.

Solar Payback Explained

Learn what drives solar payback, from system size and tariffs to batteries and incentives.

Freelance Rate Guide

Price your work with billable hours, taxes, expenses, and margin in mind.

Appliance Cost Guide

Estimate electricity cost from watts, usage hours, rates, and standby load.

TDEE & Macro Guide

Understand calorie estimates, activity multipliers, macro targets, and sleep cycles.

Retirement Savings Guide

Learn how compound growth, inflation, and withdrawals shape retirement scenarios.

About Utilvibe

Privacy-first calculators with visible assumptions.

Utilvibe builds browser-based planning tools that help people compare everyday decisions before they spend money, change habits, or request quotes.

Each calculator is designed to show the key levers, keep inputs local in the browser, and explain where estimates can differ from real-world results. Last reviewed: April 30, 2026.