Popular Tools

These are the most frequently used tools on the platform, ranked by overall community activity. Each one has earned its place through consistent usage and proven value in helping users solve everyday problems.

Token Calculator

Counts tokens in pasted text with OpenAI's o200k_base byte-pair tokenizer, exact for GPT-4o and newer and approximate for other providers.

Development

Screen Size Calculator

Find the exact screen dimensions, pixel density (PPI), and ideal viewing distance based on screen resolution, aspect ratio, and size with this...

Technology

Whitespace Formatter Tool

Improve text readability in large blocks of text or code by removing extra whitespace, standardizing heading formats, applying text transformations, and preserving...

Text

Leather Thickness Converter

Convert leather thickness between ounces, millimeters, inches, and irons.

Materials

Randomize Text Lines Tool

Shuffles lines of text using Fisher-Yates, with optional Line Groups (1 to 100) that shuffle whole blocks while preserving internal order.

Text

Dummy Text Generator

Builds placeholder text by sampling words from Lorem Ipsum or a custom source to a target word or character count.

Text

Text to Binary Converter

Converts text to binary and back using UTF-8 (8-bit bytes) or UTF-16 (16-bit code units, with surrogate pairs for characters above the...

Encoding & Decoding

Structured Text to Markdown Converter

This tool formats basic structured text blocks from a Word document into clean, consistent Markdown based on a predefined schema.

Development

Baker's Percentage Calculator

Computes ingredient ratios against flour weight, with flour anchored at 100 percent and every other row equal to (ingredient ÷ flour) ×...

Cooking

Basic Markdown Formatting Tool

This tool converts simple shorthand syntax into clean, well-structured Markdown.

Text

Days Between Dates Calculator

The Days Between Dates Calculator is a simple tool that helps you find the duration between any two calendar dates.

Time

BMR Calculator

Basal Metabolic Rate from your choice of formula: Mifflin-St Jeor (default, most accurate for the general population), revised Harris-Benedict, or Katch-McArdle (the...

Health

GPA Calculator

Cumulative GPA from sum of credit hours times grade points divided by total credit hours, with selectable USA, IB, and Primary scales.

Education

Fractions & Decimals Calculator

BigInt-backed rational arithmetic on fractions, mixed numbers, decimals, and repeating decimals with no floating-point drift.

Math

401k Calculator

Projects a 401(k) balance from current age to retirement using future-value-of-an-annuity math with employer match, salary growth, and inflation adjustment in nominal...

Finance

Packing Efficiency Calculator

Three-way packing efficiency solver: enter any two of Packing Ratio, Volume of Object, and Volume of Container, and the third is computed.

Business

ICO Converter

Packs PNG, JPEG, GIF, BMP, or WebP source images into a single multi-resolution ICO file with selectable 16, 32, 48, 64, 128...

Design

UTC to PST Time Converter

Converts dates and times between Coordinated Universal Time (UTC) and Pacific Standard Time (PST) using a fixed offset of UTC minus 8...

Time

Cooking Temperature Calculator

Converts Fahrenheit and Celsius, and maps temperatures at or above 250°F (121°C) onto the UK gas mark scale (1/2 through 10).

Cooking

Data Merge Tool

Merges rows from an XLSX or CSV source workbook into a separate template workbook by matching on a named header column (with...

Data

Why These Tools Are Popular

These Kaltask tools stand out for several reasons: they deliver quick and accurate results for common tasks, are optimized for mobile use, require no sign-up or downloads, and make it easy to share your calculations with others.

Recently Added

The latest calculators and utilities to land on Kaltask. Fresh tools, ready to use.

Spot Color To HSV Converter

Converts a spot color to HSV (hue, saturation, value) with intermediate RGB and hex output and a rendered preview swatch.

Design

New

Stair Calculator

Determine riser count, riser height, tread depth, total run, stringer length, and stair angle for one or more flights given a floor-to-floor...

Construction

New

Fence Calculator

Estimate post counts, picket quantities, rail lengths, concrete bags, and total material costs for any fence layout with multiple sections.

Construction

New

Metal Roof Calculator

Estimate total square footage, weight, and installed cost for metal roofing across multiple roof sections with adjustable pitch multipliers and materials.

Construction

New

Rug Size Calculator

Sizes rugs against room dimensions by subtracting a per-side wall clearance, then ranks the closest standard rug sizes by fit.

Construction

New

Volume Lumber Converter

Convert lumber volumes between board feet, cubic feet, cubic meters, cubic yards, cords, and MBF with full fraction and mixed-number input support.

Construction

New

Most Used Calculators

These tools are the ones users turn to most often, ranked by real usage data. This makes it easy to find high-value calculators that others already trust.

Each calculator is built for clarity and precision. Whether you are converting units, calculating percentages, or solving everyday problems, these tools offer reliable performance and are trusted by a wide audience.