Convert decimal inches to millimeters (and back) instantly using the exact 25.4 factor. Includes fraction input support, precision modes, and one-tap copy.

Bidirectional inch ↔ mm conversion with one-tap swap

Supports decimal, fraction, and mixed fraction input

+2 more features

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Utility

Decimal to Inches Calculator

Convert decimal inches into exact and nearest fractions with selectable tape precision (1/4 to 1/64), rounding direction controls, feet-inch output, and visual ruler mapping.

Exact simplified fraction plus nearest match by selected denominator

Rounding modes: nearest, always up, always down

Millimeters to Decimal

Convert millimeters to decimal inches with engineering-grade precision, nearest common fractions, and copy-ready output for machining and QA workflows.

Exact formula: inches = millimeters / 25.4

Nearest fraction bridge up to 1/64 with offset display

Hours to Decimal Calculator

Convert HH:MM or smart time strings into decimal hours for payroll and billing. Includes quarter-hour, tenth-hour, and 7-minute payroll rounding modes plus batch export.

Smart parser: 1:30, 1h 30m, 90 min, and standard H/M/S fields

Rounding modes: none, quarter-hour, tenth-hour, and 7-minute rule

Time to Decimal Converter

Convert flexible time formats like 01:30:45, 1h 30m, or 2:30 PM into decimal hours, minutes, or days. Includes precision controls, interpretation chips, and reverse conversion.

Flexible parser supports colon, textual, and clock-time inputs

Output base switch: decimal hours, decimal minutes, or decimal days

Hexa to Decimal

Developer-focused hex converter with signed/unsigned output, bit-depth toggles, endian controls, binary/octal/ASCII previews, and bit-flip debugging.

Parses plain hex, 0x-prefixed values, and space-separated byte input

8/16/32/64-bit signed two's complement with BigInt-safe calculations

Inches to Decimals

Convert fractions and mixed inches into decimal values with up to 6 places, quick fraction grid, auto-copy mode, and metric millimeter preview.

Smart parser for 5/8, 1 3/4, and 1-3/4 input styles

Live decimal inch output plus millimeter conversion

Gauge to Decimal

Convert gauge sizes to decimal inches and millimeters for sheet metal and wire standards. Fast material-specific results with tolerance ranges and quick search.

Supports sheet steel, galvanized, stainless, aluminum, and AWG wire

Shows inch + millimeter values with production-friendly precision

Decimal to Text

Decode decimal character codes into plain text instantly. Convert inputs like 72 101 108 108 111 to Hello for debugging, quick data checks, and encoding practice.

Supports space/comma/newline separated decimal codes

ASCII and Unicode code point decoding

Fraction to Decimal

Convert proper fractions, improper fractions, and mixed numbers to decimals — and decimals back to simplified fractions. Built for homework and quick math (not tape-measure inches).

Fraction ↔ decimal with clear repeating-decimal notes

Shared math engine with our other converters

Convert Inches to Decimal

Professional inches to decimal converter for construction, woodworking, and manufacturing. Convert fractional inches (5 3/4) to decimal inches (5.75) instantly with visual ruler and precision control.

Bidirectional Fraction ↔ Decimal Conversion

Visual Ruler with Measurements

+2 more features

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