Explore Kr3 Tool Free Online

Convert, Calculate, Edit & Create — all in one place.Free & easy to use.fast and mobile friendly.

8 Hour Calculator

Time tracking tool to calculate 8-hour schedules.

Calculate working hours

ACT Composite Score Calculator

Estimate ACT composite scores quickly.

ADP Paycheck Calculator

Salary & tax estimator.

Amps to kW Calculator

Electrical power conversion tool.

Audiobook Calculator

Estimate listening time & chapters.

Audiobook Speed Calculator

Adjust playback speed & estimate time.

Bitcoin Mining Profitability

Estimate mining earnings & profitability.

Break Even Calculator

Calculate break-even point for products.

Body Fat Calculator

Estimate body fat percentage (male/female).

Calories Burned Calculator

Estimate calories burned while running.

CFT Calculator

Cubic feet (volume) converter.

Chipotle Nutrition Calculator

Calories & macros estimate for Chipotle menu items.

Compensation Calculator

Salary & benefits estimator.

Freelance Rate Calculator

Calculate hourly freelance rates.

General Calculator

Basic arithmetic & quick calculations.

GST Calculator (India)

GST rates & tax calculations for India (2025).

Home Loan Calculator

Loan EMI & amortization (Bangladesh focused).

Repiping Cost Calculator

Estimate plumbing repiping costs.

Insulin Calculator

Dosage & carb-ratio helper (informational only).

Neb Calculator

Nebulizer dosage guidance (informational).

NSQIP Risk Calculator

Surgical risk assessment tool.

Peptide Calculator

Mixing & concentration calculations.

Points Calculator

Track & calculate rewards points.

Pro Rata Calculator

Salary or payment prorating tool.

Productivity Calculator

Work efficiency measurement tool.

Profit Margin Calculator

Instant seller profit margin calculator.

Refill Calculator

Calculate next prescription refill dates.

Rent Vs Buy Calculator

Compare renting vs buying with taxes (2025).

Responsive Breakpoints Calculator

Find CSS breakpoints for responsive design.

Retirement Savings Calculator

Plan retirement savings & projections.

ROl Calculator

ROI for Google Ads & campaigns.

Row Echelon Calculator

Solve matrices to row echelon form.

Shell Method Calculator

Volume of solids of revolution (shell method).

Sig Fig Calculator

Significant figures rounding & counting tool.

Strength Calculator

Assess physical strength & fitness metrics.

Synology RAID Calculator

Estimate usable storage for RAID arrays.

Tablet Dosage Calculator

Weight-based tablet dosing for dogs (informational).

Time Zone Difference Calculator

Compare time zones around the world.

VPN Speed Test

Test your VPN or connection speed.

Word Counter

Count words, characters and estimate reading time.

Image to PDF Converter

Convert images into a single PDF file.

JPG to PNG

Convert JPG images to PNG format.

PNG to WebP Converter

Optimize images and convert to WebP.

PDF to Word

Convert PDF documents to editable Word files.

HEIC to JPG

Convert iPhone HEIC files to JPG (bulk).

PDF Compress

Reduce PDF file size for upload/sharing.

Merge PDF

Combine multiple PDFs into one file.

PDF to Text (OCR)

Extract text from scanned PDFs with OCR.

Remove Pages From PDF

Delete unwanted pages from PDF documents.

Merge MP3 Files

Combine audio files quickly and for free.

WebM to MP4

Fast video format conversion.

Image Watermark

Add or remove watermarks from images.

Favicon Generator

Create favicon from images or text fast.

Paraphrase Sentence

Quick paraphrasing for short sentences.

Plagiarism Checker

Check short text for plagiarism.

Hex to RGB Converter

Convert color codes between hex and RGB.

Generate Strong Password

Create secure passwords instantly.

WAV to MP3 Converter

Convert audio files quickly.

Coming Calculator

New calculator coming soon.

Coming