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Browse the growing Access Free Tools library by task, then open the tool or guide that matches what you are trying to finish.

Start with the strongest hubs

These are the best entry points for common jobs: quick calculators, money estimates, health estimates, home projects, AI helpers, school work, and developer tasks.

Calculators61 tools and 61 guides. Everyday math, finance, school, and measurement calculators.Finance85 tools and 85 guides. Savings, budget, payment, interest, and comparison tools.Health & Fitness33 tools and 33 guides. Simple wellness calculators with clear educational disclaimers.Home & Projects47 tools and 47 guides. Material, room, yard, and building-project estimators for rough planning.AI Tools10 tools and 10 guides. Browser-only AI helpers for text, images, OCR, summaries, and writing checks.School & Study4 tools and 4 guides. Student-friendly tools for notes, math, timing, and planning.Developer Tools17 tools and 17 guides. Encoding, formatting, JSON, URL, and productivity utilities.Free Calculator ResourcesA curated starting page for students, teachers, writers, and community links.

Browse by task

Categories keep the site readable as the library grows, with calculators, guides, and related utilities grouped together.

Calculators

Everyday math, finance, school, and measurement calculators.

Converters

Unit, file, color, text, and measurement conversion tools.

Text Tools

Word counts, case changes, cleanups, and formatting helpers.

Date & Time

Date differences, time zones, countdowns, and scheduling helpers.

Finance

Savings, budget, payment, interest, and comparison tools.

Health & Fitness

Simple wellness calculators with clear educational disclaimers.

Home & Projects

Material, room, yard, and building-project estimators for rough planning.

Developer Tools

Encoding, formatting, JSON, URL, and productivity utilities.

Image Tools

Simple browser-based image helpers for daily creative tasks.

AI Tools

Browser-only AI helpers for text, images, OCR, summaries, and writing checks.

School & Study

Student-friendly tools for notes, math, timing, and planning.

Everyday Tools

Quick utilities for ordinary tasks, decisions, and checklists.

Guides where context matters

Some tools need extra explanation because the wrong input can change the result a lot. Start with the tool, then read the guide before using the number for a project or safety-related decision.

Watts to Amps CalculatorUse watts, volts, phase type, and power factor to estimate current, with clear electrical safety limits.Watts to amps guideRead why voltage and phase can change the amps result before using the number around real equipment.Wallpaper CalculatorEstimate wallpaper rolls from wall size, openings, roll coverage, pattern repeat, and waste percent.Wallpaper calculator guideLearn what waste percent, roll coverage, pattern repeat, and dye lots mean before buying rolls.

Category snapshot

Start with a major section, or jump into one of its most useful tools.

Calculators

61 tools

Everyday math, finance, school, and measurement calculators.

61 guides available

Basic CalculatorA clean browser calculator for quick arithmetic, percent checks, and copied results.
Percentage CalculatorFind percent-of answers, percent change, discounts, and original values with reverse percentages.
Ratio CalculatorSimplify ratios, scale matching ratios, and split totals by ratio parts.
Converters

7 tools

Unit, file, color, text, and measurement conversion tools.

7 guides available

Conversion CalculatorConvert length, mass, volume, and temperature units with clear formula steps.
Shoe Size ConversionConvert foot length into approximate US men, US women, UK, and EU adult shoe sizes.
Text Tools

5 tools

Word counts, case changes, cleanups, and formatting helpers.

5 guides available

Word CounterCount words, characters, sentences, paragraphs, lines, and estimated reading time.
Character CounterCount characters, words, lines, no-space text, and UTF-8 bytes.
Text Case ConverterConvert text across 8 case styles: uppercase, lowercase, title case, sentence case, camelCase, PascalCase, snake_case, and kebab-case.
Date & Time

8 tools

Date differences, time zones, countdowns, and scheduling helpers.

8 guides available

Age CalculatorCalculate exact calendar age in years, months, days, and total days.
Date CalculatorAdd or subtract days from a date, or count full days between two dates.
Time CalculatorAdd or subtract hours, minutes, and seconds with normalized H:M:S, total seconds, and decimal hours.
Finance

85 tools

Savings, budget, payment, interest, and comparison tools.

85 guides available

Mortgage CalculatorEstimate monthly principal, interest, taxes, insurance, PMI, and HOA costs.
Loan CalculatorSolve for monthly payment, loan amount, interest rate, or payoff term for a fixed-rate loan.
Auto Loan CalculatorEstimate a car payment from vehicle price, tax, fees, down payment, trade-in, rate, and term.
Health & Fitness

33 tools

Simple wellness calculators with clear educational disclaimers.

33 guides available

BMI CalculatorEstimate adult body mass index and healthy BMI weight range.
Home & Projects

47 tools

Material, room, yard, and building-project estimators for rough planning.

47 guides available

Concrete CalculatorEstimate slab volume, cubic yards, cubic meters, and common 40, 60, and 80 lb bag counts.
Roofing CalculatorEstimate roof squares and shingle bundles from footprint, pitch, and waste.
Tile CalculatorEstimate floor, wall, or shower tile count from square feet, tile size, and waste.
Developer Tools

17 tools

Encoding, formatting, JSON, URL, and productivity utilities.

17 guides available

Subnet CalculatorCalculate IPv4 CIDR network, broadcast, mask, wildcard, and usable host range.
Password GeneratorGenerate strong random passwords with length, character sets, and ambiguity controls.
Image Tools

3 tools

Simple browser-based image helpers for daily creative tasks.

3 guides available

AI Tools

10 tools

Browser-only AI helpers for text, images, OCR, summaries, and writing checks.

10 guides available

Prompt Token EstimatorEstimate prompt tokens from text length with a visible rough range and tokenizer warning.
Image to Text OCR ToolCopy text from screenshots, labels, receipts, and clear document images without uploading the image.
School & Study

4 tools

Student-friendly tools for notes, math, timing, and planning.

4 guides available

GPA CalculatorEstimate GPA from course credits and letter grades on a common 4.0 scale.
Grade CalculatorFind the final exam grade needed to reach a desired course grade.
Molarity CalculatorCalculate molarity, moles, or grams from final solution volume in liters or milliliters.
Everyday Tools

23 tools

Quick utilities for ordinary tasks, decisions, and checklists.

23 guides available

Dice RollerRoll one or more virtual dice with custom sides and a modifier.
Four in a Row GamePlay a local four-in-a-row strategy game against a friend or the computer.