Free Tools Network

A network of 50+ free, browser-based calculators and utilities from the same team. Every tool runs client-side, with no signup and nothing stored on a server.

Calculators & measurement

thesquarefootagecalculator.com

Measure square footage for floors, walls, rooms and land across many shapes — rectangles, triangles, circles and irregular layouts — with unit conversion handled for you.

boxvolumecalculator.com

Calculate the volume and capacity of boxes, cartons and rectangular containers in any units, for packing, shipping and storage planning.

tankvolumecalc.com

Find the volume and fill level of tanks in many shapes — cylindrical, oval, rectangular and capsule, horizontal or vertical — for water, fuel and chemical storage.

cubicyardage.com

Concrete and bulk-material calculators that work the way contractors do, in cubic yards, for slabs, footings, columns, walls and stairs.

concretematerialcalc.com

India-focused construction calculators for concrete, mortar and bulk materials, with bag counts, mixes and a glossary of terms.

staircalculators.net

Work out stair dimensions — rise, run, stringer length and headroom — to code, for carpentry and building projects.

constructioncalchq.com

A hub of construction and material calculators — drywall, concrete, framing, flooring and more — with cost estimates and code-aware defaults.

poolvolumecalc.com

Calculate swimming-pool volume and water capacity for any shape — rectangular, oval, round and freeform — plus chemical-dosing helpers.

roofingmaterialcalc.com

Estimate roofing materials — shingles, underlayment and accessories — from roof area and pitch, with chimney and skylight deductions.

dimweightcalc.com

Compute dimensional (volumetric) weight for FedEx, UPS, USPS and others and compare it against actual weight to predict shipping charges.

girthcalculator.com

Measure a package's girth and combined length-plus-girth and check it against carrier oversize limits before you pay for shipping.

measurechef.com

Kitchen measurement and recipe-conversion tools — scale ingredients, convert units and adjust servings cleanly.

fractionsteps.com

Add, subtract, multiply and divide fractions with full step-by-step working, plus proportion and multi-fraction solvers.

unitcheatsheet.com

A fast reference and converter for units of length, weight, volume, temperature and more — the conversions you actually look up.

Solar, electrical & home

prosolarcalc.tools

Professional solar sizing and design tools for installers and serious DIY builders, from panels through to storage.

solarbatterybankcalc.com

Off-grid and backup solar sizing done with real engineering — usable capacity, C-rate, voltage and battery chemistry.

backuppowercalc.com

Size generators and battery backup for your home or site, matching run-time and load to the right capacity.

voltdropcalc.com

Calculate voltage drop and the correct wire gauge for any DC or AC run across NEC, CEC, BS 7671, AS/NZS and IEC standards.

actonnagecalc.com

Work out the air-conditioner tonnage and cooling load a room or home needs, based on area, climate, insulation and sun exposure.

Finance & business

totalinterestcalc.com

See the full lifetime cost of a mortgage or loan — total interest, amortization schedule and the effect of extra payments.

indiaemi.com

An EMI calculator built for India, covering home, car and personal loans plus credit-card EMI plans with GST.

sipcalculatorhub.com

Plan SIP mutual-fund investments with post-tax and inflation-adjusted returns, built for Indian investors.

marginvsmarkup.com

Convert between margin and markup and price products correctly, clearing up the confusion that quietly erodes profit.

bestpercentagecalculator.net

Handle every kind of everyday percentage problem — percentage of a number, change, increase, decrease and reverse — in one clear tool.

Developer & web utilities

jsontools.tools

Format, validate, minify and explore JSON in your browser, with a tree viewer that makes large or messy payloads easy to read.

base64decode.tools

Encode text and files to Base64 or decode them back, entirely client-side so nothing you paste ever leaves your machine.

urlencodedecode.com

Percent-encode and decode URLs and query strings so special characters transmit safely, with full Unicode support.

hashgenerator.tools

Generate MD5, SHA-1, SHA-256 and other cryptographic hashes from text or files for checksums and integrity checks.

uuidcore.com

Generate UUIDs in bulk and learn how the different versions work, with copy-ready output for development and testing.

regexguide.com

Build, test and understand regular expressions with live matching and a reference that explains each token in plain language.

crontabsheet.com

Build cron schedules visually and read back exactly when a crontab expression will run, with a cheat sheet of common patterns.

epochtime.tools

Convert between Unix epoch timestamps and human-readable dates in any time zone, in seconds or milliseconds, both directions.

cidrcalculator.net

Work out network and broadcast addresses, host ranges and subnet sizes from CIDR notation, with clear breakdowns.

subnetmaskcalc.net

Calculate subnet masks, host counts and address ranges, with worked examples and code snippets for network engineers.

barcodeandqr.com

Generate barcodes and QR codes in many formats and export them print-ready as PNG or PDF, rendered locally in your browser.

removemetadata.tools

Strip hidden metadata — EXIF, location, author — from images, PDFs, Office files, audio and video entirely in your browser.

corepdftools.com

Merge, split, compress, rotate and password-protect PDF files client-side, so your documents never leave your device.

colorcodekit.com

Convert color codes between HEX, RGB, HSL and more, build palettes and gradients, and export tokens for SwiftUI, Flutter and Compose.

checkmyipnow.com

Look up your public IP address with geolocation, ASN and network details — privacy-first and checked in your browser.

whoislookuppro.com

RDAP-first WHOIS and DNS lookup for any domain — registration dates, nameservers, status codes and security signals.

checkinternetspeed.tools

Test your internet download, upload and latency right in the browser, with a clean, ad-light interface and no app to install.

pictoolkit.com

A toolkit of browser-based image utilities for resizing, converting and editing pictures without uploading them anywhere.

Text & time

wordcounterfree.com

Count words, characters, sentences and paragraphs and estimate reading time as you type — for essays, articles and content limits.

transformcase.com

Convert text between upper, lower, title and sentence case in one click, handy for cleaning up copy and code.

textrepeat.net

Repeat, duplicate and generate blocks of text quickly, with control over separators and counts for testing and formatting.

numtotext.com

Convert numbers to words, including Indian rupee and cheque formats, for invoices, forms and accounting.

calculatehours.net

Add up the hours between start and end times, including overnight spans and breaks — for timesheets, shifts and payroll.

clockwithus.com

Check the current time across world cities and time zones at a glance, for scheduling calls across regions.

theagecalculator.net

Calculate exact age in years, months and days, plus milestones, birthday countdowns and age comparisons.

passwordstrength.net

Test how strong a password is and how long it would take to crack, checked locally and never sent anywhere.

Health

calorieskit.com

A suite of calorie, macronutrient and body-composition calculators — daily needs, protein targets, lean body mass — with clear methodology.

bmibmrcalc.com

Calculate BMI, BMR and TDEE with goal planning, progress tracking and a macro breakdown.

These are sites in our own network, linked openly with rel="nofollow noopener". We link them because they are built to the same standard, not as paid placements.