120 Free Calculators

The Calculator
You Did Not Know Existed

GridCraft is a free, no-signup collection of 120 niche calculators spanning finance, health, cooking, legal, gaming, and sustainability. Rarely useful — until the day you need it exactly.

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120
Free calculators
9
Major categories
0
Sign-ups required
100%
Browser-based
Popular This Week
Compound Interest Calculator
Finance & Wealth
FIRE Calculator
Financial Independence
Dimensional Weight Calculator
Shipping & Logistics
Fat Loss Rate Calculator
Health & Fitness
Divorce Cost Estimator
Legal Services
Exploration Bonus Calculator
Gaming & Sims
About GridCraft

Built for the Problem You Cannot Find a Tool For

Most calculator websites cover the obvious use cases — mortgage payments, tip calculators, unit conversions. GridCraft was built for everything else: the weird, niche, or domain-specific calculations that professionals, enthusiasts, and curious people encounter but never have a dedicated tool for.

You probably will not need most of these calculators. But the one day you need to estimate a divorce cost, figure out a fermentation time, calculate dragon raid damage, or work out dimensional weight for shipping — it will be here. No signup, no premium tier, no pop-ups.

Domain-Specific
Tools built for real-world niches — not generic categories. Each one reflects how professionals and enthusiasts actually think.
Completely Free
Every one of the 120 calculators is free. No account, no paywall, no hidden premium features. Open and use immediately.
No Data Collection
All calculations run in your browser. Nothing is sent to our servers. Your numbers stay on your device.
Regularly Updated
New calculators added every month based on real requests from users across different industries and hobbies.
Who Uses GridCraft
Finance
Investors & Planners
Compound interest, FIRE numbers, DCF valuations, CAPM calculations, and capital gains projections — all without a Bloomberg terminal.
Legal
Attorneys & Mediators
Estimate divorce costs, employment tribunal fees, force majeure claims, confidentiality breach penalties, and construction liens.
Health
Individuals & Professionals
Track fat loss rates, food sensitivity timelines, fertility treatment costs, body clock sleep phases, and baby kick counts.
Kitchen
Cooks & Bakers
Convert baking pan sizes, calculate cheese yields, time ferments and detox teas, and get fish doneness temperatures right.
Gaming
Players & Builders
Dragon raid damage, enemy vulnerability, crafting queue time, action RPG skill builds, coin farming rates, and escape room pacing.

What Can You Calculate?

Nine categories, 120 tools — from compound interest to cheese yield to dragon raid damage.

01 — Finance & Wealth

Investments, Debt & Planning

Compound interest, FIRE retirement numbers, discounted cash flow valuations, CAPM beta calculations, debt snowball vs avalanche comparisons, and capital gains projections. Tools for personal finance and investment analysis without expensive software.

22+ tools
02 — Legal Services

Courts, Fees & Compensation

Estimate divorce costs, employment tribunal fees, force majeure claims, confidentiality breach penalties, construction lien amounts, estate planning costs, and copyright registration fees. Built for legal professionals and individuals navigating legal processes.

10+ tools
03 — Health & Body

Fitness, Family & Wellness

Track fat loss rates, food sensitivity elimination timelines, fertility treatment costs, body clock sleep phases, baby kick counts, baby clothing sizes by month, and calories burned by activity. Tools for individuals and health professionals.

10+ tools
04 — Kitchen & Cooking

Baking, Brewing & Food Science

Convert baking pan sizes, calculate cheese yield from milk, time ferments and cheese-making, get fish doneness temperatures right, steep detox teas properly, and adjust cooking times per pound. For serious home cooks and professionals.

10+ tools
05 — Environment

Carbon, Energy & Sustainability

Measure dietary carbon footprint, calculate flight shame offsets, diesel vs electric bus costs, environmental remediation pricing, algae bloom impacts, community wind farm ROI, and circular economy savings. For sustainability teams and concerned individuals.

9+ tools
06 — Gaming & Sims

Damage, Strategy & Optimization

Dragon raid damage, enemy vulnerability, crafting queue time, action RPG skill build optimization, coin farming rates, and escape room pacing. Tools for players who want to optimize their time and strategy in games.

6+ tools

Browse Calculators

A selection from 120 tools — filter by category.

Compound Interest Calculator
Finance & Wealth
Free →
Discounted Cash Flow Calculator
Finance & Wealth
Free →
FIRE Calculator
Financial Independence
Free →
Capital Gains Calculator
Finance & Wealth
Free →
Divorce Cost Estimator
Legal Services
Free →
Employment Tribunal Fee Estimator
Legal Services
Free →
Dimensional Weight Calculator
Shipping & Logistics
Free →
Ex-Works Pricing Calculator
Shipping & Logistics
Free →
Fat Loss Rate Calculator
Health & Fitness
Free →
Fertility Treatment Cost Estimator
Health & Family
Free →
Baby Kick Count Tracker
Health & Family
Free →
Fish Doneness Temperature Calculator
Kitchen & Cooking
Free →
Fermentation Time Calculator
Kitchen & Brewing
Free →
Cake Pan Conversion Calculator
Kitchen & Baking
Free →
Cheese Yield Calculator
Kitchen & Dairy
Free →
Dietary Carbon Footprint Comparison
Environment
Free →
Flight Shame Offset Cost Calculator
Environment & Travel
Free →
Diesel vs. Electric Bus Cost Calculator
Environment
Free →
Dragon Raid Damage Calculator
Gaming & Sims
Free →
Action RPG Skill Build Optimizer
Gaming
Free →
Escape Room Time Calculator
Gaming
Free →
Coin Farming Rate Calculator
Gaming
Free →
Churn Rate Calculator
Business & SaaS
Free →
DAU Calculator
Business & SaaS
Free →
Follower Growth Calculator
Social Media
Free →
Cost-Plus Pricing Calculator
Business
Free →
Credit Score Impact Calculator
Finance
Free →
CAPM Calculator
Finance & Investments
Free →
Debt Snowball vs. Avalanche Calculator
Finance
Free →
Enterprise Value Calculator
Finance
Free →
Confidentiality Breach Penalty Estimator
Legal
Free →
Estate Planning Cost Estimator
Legal
Free →
FHA Loan Calculator
Finance & Property
Free →
Body Clock Sleep Phase Calculator
Health
Free →
Baking Pan Size Adjustment Calculator
Kitchen & Baking
Free →
Community Wind Farm ROI Calculator
Environment & Energy
Free →
Exploration Bonus Calculator
Gaming & Sims
Free →
Engagement Win Probability Calculator
Business
Free →
Cash Flow Forecast Calculator
Business & Finance
Free →
Aspect Ratio Calculator
Design & Media
Free →
120
Free calculators
9
Major categories
0
Account required
100%
Browser-based

Frequently Asked Questions

Common questions about GridCraft.

Yes. Every calculator on GridCraft is completely free to use. There are no premium tiers, no feature restrictions, and no need to create an account. All 120 tools are available immediately when you need them.
GridCraft covers nine major categories: Finance & Wealth, Legal Services, Health & Body, Kitchen & Cooking, Environment, Gaming & Sims, Shipping & Logistics, Business Operations, and General Utility. Within those, there are highly specialized tools like dragon raid damage calculators, cheese yield calculators, and dimensional weight tools.
Yes. All calculations run entirely in your browser. No input data is sent to our servers, stored in databases, or shared with third parties. Your numbers are yours alone.
GridCraft was built on the idea that useful tools should not be siloed into separate niche sites. A serious home cook, an indie game player, and a financial analyst all need calculators — and they should not have to visit three different websites to find them. The breadth is intentional.
Yes. New calculators are added every month based on user requests. If you encounter a calculation need that is not covered, contact us and we will evaluate it for the next development cycle.
Yes. Finance tools use standard formulas used by analysts and planners — DCF, compound interest, CAPM, debt snowball/avalanche methods. Domain-specific tools like fermentation timing and dimensional weight follow industry conventions and standards.
GridCraft is supported by contextual advertising. We use minimal, non-intrusive ads that are relevant to the calculator you are using. No pop-ups, no interstitials, no dark patterns.
The calculators are designed to support professional and personal decision-making. They are provided as reference tools and are not a substitute for licensed professional advice in legal, financial, medical, or regulatory matters.

Rarely Needed — Until You Do

120 free calculators across 9 categories. No signup, no cost.

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