Aisha K.
Mar 12, 2026
Clean layout and the results update instantly. Exactly what I needed for a quick planning check.
Unit Converters
SI vs IEC Byte Scaler (kB/MB/GB vs KiB/MiB/GiB/PiB)
SI: × 1,000ⁿ. IEC: × 1,024ⁿ. Convert through bytes, then divide by the destination factor.
Decimal SI (1,000) and binary IEC (1,024) in one grid. A drive sold as 1 TB (10¹² bytes) is about 0.909 TiB. A “1 GB” RAM stick is usually 1 GiB. Pick both dictionaries instead of arguing in a comment thread. Bits are not on this page — use bits to bytes first.
Decimal SI vs binary IEC
gigabytes
1.073742 GB
Drive boxes print SI. Operating systems often print IEC. Both ladders go through bytes.
- You entered
- 1 GiB
- 1 GiB in GB
- 1.073742
- 1 PiB in PB
- 1.1259
Plain-English guide
Terms & how it works
Confused by a field? Read the short definitions here while you use the tool.
From unit
The “From unit” value used in this tool’s formula. Adjust it to see results update live.
How this calculator works
Decimal SI (1,000) and binary IEC (1,024) in one grid. A drive sold as 1 TB (10¹² bytes) is about 0.909 TiB. A “1 GB” RAM stick is usually 1 GiB. Pick both dictionaries instead of arguing in a comment thread. Bits are not on this page — use bits to bytes first. SI: × 1,000ⁿ. IEC: × 1,024ⁿ. Convert through bytes, then divide by the destination factor. Example: 1 GiB = 1.073741824 GB. 1 PiB ≈ 1.1259 PB. 500 GB advertised ≈ 465.66 GiB.
SI: × 1,000ⁿ. IEC: × 1,024ⁿ. Convert through bytes, then divide by the destination factor.
Example: 1 GiB = 1.073741824 GB. 1 PiB ≈ 1.1259 PB. 500 GB advertised ≈ 465.66 GiB.
When to use this SI vs IEC Byte Scaler
Common use cases
- Decimal SI (1,000) and binary IEC (1,024) in one grid. A drive sold as 1 TB (10¹² bytes) is about 0.909 TiB. A “1 GB” RAM stick is usually 1 GiB. Pick both dictionaries instead of arguing in a comment thread. Bits are not on this page — use bits to bytes first.
- Sanity-check with this case: 1 GiB = 1.073741824 GB. 1 PiB ≈ 1.1259 PB. 500 GB advertised ≈ 465.66 GiB.
- The relationship is: SI: × 1,000ⁿ. IEC: × 1,024ⁿ. Convert through bytes, then divide by the destination factor.
Localized examples
- Unit Converters: the example on this page uses the same formula as the widget.
What you get
- Fields: From unit
- SI: × 1,000ⁿ. IEC: × 1,024ⁿ. Convert through bytes, then divide by the destination factor.
- Example on the page: 1 GiB = 1.073741824 GB. 1 PiB ≈ 1.1259 PB. 500 GB advertised ≈ 465.66 GiB.
How to Convert SI vs IEC Byte Scaler Step-by-Step
- 1Enter From unit. Use the values you have, not a catalog average, unless that is all you know.
- 2SI: × 1,000ⁿ. IEC: × 1,024ⁿ. Convert through bytes, then divide by the destination factor.
- 3Worked case: 1 GiB = 1.073741824 GB. 1 PiB ≈ 1.1259 PB. 500 GB advertised ≈ 465.66 GiB.
- 4Check which dictionary the other person is using — US or UK, decimal or 1,024 — then trust the number.
Governing formula
SI: × 1,000ⁿ. IEC: × 1,024ⁿ. Convert through bytes, then divide by the destination factor.
1 GiB = 1.073741824 GB. 1 PiB ≈ 1.1259 PB. 500 GB advertised ≈ 465.66 GiB.
Example: set From unit = 1, then read the result.
Variable definitions
- value
From unit
The “From unit” field. Default 1; typical range 0–1000000000000000000.
- The conversion (SI: × 1,000ⁿ. IEC: × 1,024ⁿ. Convert through bytes, then divide by the destination factor.) does not pick US vs UK gallons, SI vs binary megabytes, or Mach at altitude for you. Read the footnote on the page.
- Nothing here is uploaded for the calculation itself.
Frequently Asked Questions
This site’s KB is 1,000 bytes. KiB is 1,024. Mac Finder and Windows have swapped stories over the years.
Related calculators
Unit Converters
- Pebibytes to Petabytes1 PiB = 1,024⁵ bytes = 1,125,899,906,842,624 bytes. 1 PB = 10¹⁵ bytes. Multiply PiB by 1.125899906842624. Cloud “petabyte” quotes often mean PB; file-system df -h often means PiB. The SI vs IEC scaler does the rest of the ladder.
- Gibibytes to Gigabytes1 GiB = 2³⁰ bytes. 1 GB = 10⁹ bytes. Multiply GiB by 1.073741824. A 931 GiB “1 TB” disk is the classic unboxing surprise: 1,000,000,000,000 bytes ≈ 931 GiB.
- ASCII / Unicode Code PointsType a character, a decimal code, 0x41, or U+1F600. You get the code point, hex, binary, and UTF-8 bytes. ASCII is 0–127. Everything else is Unicode. This is not an encoding converter for files — it is one scalar value at a time.
- Audio Bitrate StorageUncompressed-ish math: size in bytes = bitrate (bits/s) × seconds ÷ 8. A 320 kbps MP3, 4 minutes, is about 9.6 MB. CD audio 1,411 kbps is 10.6 MB per minute. Variable bitrate files will miss this — it is an average-rate sketch.
- Base64 to ImagePaste a data URL or raw base64. The browser draws it here; nothing is uploaded. Size is about length × 3/4 bytes. Huge strings can freeze a tab — that is your RAM, not a server.
- Bits to BytesEight bits make a byte. Networks advertise bits (Mbps). Disks advertise bytes. Divide bits by 8. A 1,000,000 bit dump is 125,000 bytes — not a megabyte of disk unless you meant megabits.
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Reviews & Ratings
See what others think about this tool, then leave your own rating to help improve CalculioHub.
4.8
out of 5.0
4 reviews
Daniel R.
Feb 28, 2026
Very usable on mobile. Would love a save/export option later, but the math feels solid.
Priya S.
Feb 3, 2026
The FAQ section answered my questions before I even had to search. Smooth dark mode too.
Marcus L.
Jan 19, 2026
Simple inputs, clear outputs. This replaced three bookmarks I used to juggle.
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