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Powerful Tools for Real-World Decisions

191+ free calculators, 40 downloadable data lists, and 73 live financial trackers across 9 categories — tools, lists, trackers, and articles all in one place.

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Personal Finance

Gas Price Tracker

Live gas prices by state, crude oil trends, and your personal cost impact

Freelance & Business

Salary Percentile Calculator

Government wage data to know if you're paid fairly by occupation and state

Home & Real Estate

Tree Canopy Shade Calculator

Shadow length and shaded area by season and latitude

Math & Science

Tree Age Estimator

Estimate tree age from trunk diameter using ISA growth factors

Personal Finance

Treasury Bill Calculator

Live Treasury yields with state tax advantage and CD comparison

Freelance & Business

Employee Cost Calculator

Calculate the true total cost of hiring an employee beyond salary

Health & Fitness

Protein Per Dollar Calculator

Rank any food by protein grams per dollar with live USDA data

Health & Fitness

Life Expectancy Calculator

See how your lifestyle choices impact your projected lifespan

Personal Finance

Inflation Calculator

See what your money was worth then — or will be worth in the future.

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Gas Price Tracker

Live gas prices by state, crude oil trends, and your personal cost impact

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137 Foundry — custom app building studio

Explore by Category

Every tool is organized into focused collections.

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Home & Real Estate

Mortgages, renovation, and property tools

32 tools

Health & Fitness

Calculators for body, nutrition, and wellness

28 tools

Freelance & Business

Tools for freelancers and small business owners

25 tools

Everyday Calculators

Quick calculators for daily decisions

19 tools

Writing & Content

Tools for writers, bloggers, and marketers

19 tools

Dev & Tech

Utilities for developers and technical users

23 tools

Cooking & Kitchen

Recipe tools, conversions, and kitchen calculators

10 tools

Personal Finance

Retirement, budgeting, and investment planning tools

19 tools

Math & Science

Scientific calculators, graphing, and engineering tools

16 tools

Honey-Do Tracker — home maintenance for landlords and property managers

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Browse Our Collection of Tools

Explore 191+ free tools across 9 categories — from everyday calculators to personal finance, health, writing, and dev tools. Search or browse to find exactly what you need.

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Every tool runs entirely in your browser — just open it and go. No registration, no email, no waiting. Results appear as you type, and you can export or share them without ever logging in.

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Create a free account and every calculation you save is stored in your personal history. Come back any time to restore a previous result — no re-entering numbers, no starting from scratch.

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EvvyTools Pro removes all ads and unlocks advanced features on every tool — amortization schedules, comparison modes, detailed breakdowns, and more. Just $4/month or $40/year.

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