Data Storage Converter
Convert file sizes and compare decimal vs binary storage units.
Choose units
Enter a value, pick the units, and the conversion updates instantly.
Quick converter. Results update locally in your browser.
Decimal units use powers of 1000. Binary units like KiB, MiB, GiB, TiB, and PiB use powers of 1024.
Conversion notes
Companion units, sanity checks, and precision notes.
What this means
1 gigabytes converts to 1,000 megabytes. The reverse check is 1 gigabytes, which is useful for spotting unit-entry mistakes.
Copy result
Copy a short conversion note without saving the input anywhere.
| Unit | Converted value | Based on |
|---|---|---|
| megabytes | 1,000 megabytes | 1 gigabytes |
| bits | 8,000,000,000 bits | 1 gigabytes |
| bytes | 1,000,000,000 bytes | 1 gigabytes |
| kilobytes | 1,000,000 kilobytes | 1 gigabytes |
| gigabytes | 1 gigabytes | 1 gigabytes |
- Converted value
- 1,000 megabytes
- Based on
- 1 gigabytes
- Converted value
- 8,000,000,000 bits
- Based on
- 1 gigabytes
- Converted value
- 1,000,000,000 bytes
- Based on
- 1 gigabytes
- Converted value
- 1,000,000 kilobytes
- Based on
- 1 gigabytes
- Converted value
- 1 gigabytes
- Based on
- 1 gigabytes
Storage planning decision
Use this when the converted amount is real data you need to keep, not just a unit translation. Figures stay local and include decimal GB plus OS-style GiB.
| Planning line | Capacity to budget | OS-style equivalent | Why |
|---|---|---|---|
| Primary capacity with 20% free | 1.25 GB | 1.16 GiB | Budget this much primary capacity if the entered amount is the data you need to store and you want 20% free space left for snapshots, cache, updates, and normal growth. |
| Primary + one backup | 2 GB | 1.86 GiB | Primary copy plus one complete backup copy. This is a minimum planning line, not a full resilience strategy. |
| 3-2-1 copy target | 3 GB | 2.79 GiB | Three total copies across at least two media types, with one copy offsite or cloud-based. |
- Capacity to budget
- 1.25 GB
- OS-style equivalent
- 1.16 GiB
- Why
- Budget this much primary capacity if the entered amount is the data you need to store and you want 20% free space left for snapshots, cache, updates, and normal growth.
- Capacity to budget
- 2 GB
- OS-style equivalent
- 1.86 GiB
- Why
- Primary copy plus one complete backup copy. This is a minimum planning line, not a full resilience strategy.
- Capacity to budget
- 3 GB
- OS-style equivalent
- 2.79 GiB
- Why
- Three total copies across at least two media types, with one copy offsite or cloud-based.
GB vs GiB reference
Decimal units are powers of 1000; binary units are powers of 1024.
| Decimal unit | Binary equivalent | Why it matters |
|---|---|---|
| 1 megabytes | 0.95 MiB | OS-reported capacity may use the binary figure. |
| 1 gigabytes | 0.93 GiB | OS-reported capacity may use the binary figure. |
| 1 terabytes | 0.91 TiB | OS-reported capacity may use the binary figure. |
- Binary equivalent
- 0.95 MiB
- Why it matters
- OS-reported capacity may use the binary figure.
- Binary equivalent
- 0.93 GiB
- Why it matters
- OS-reported capacity may use the binary figure.
- Binary equivalent
- 0.91 TiB
- Why it matters
- OS-reported capacity may use the binary figure.
Advertised drive vs OS shown
| Advertised | OS may show | Approx difference |
|---|---|---|
| 128 GB | 119.21 GiB | 8.79 “GB-number” gap |
| 256 GB | 238.42 GiB | 17.58 “GB-number” gap |
| 512 GB | 476.84 GiB | 35.16 “GB-number” gap |
| 1,000 GB | 931.32 GiB | 68.68 “GB-number” gap |
| 2,000 GB | 1,862.65 GiB | 137.35 “GB-number” gap |
| 4,000 GB | 3,725.29 GiB | 274.71 “GB-number” gap |
- OS may show
- 119.21 GiB
- Approx difference
- 8.79 “GB-number” gap
- OS may show
- 238.42 GiB
- Approx difference
- 17.58 “GB-number” gap
- OS may show
- 476.84 GiB
- Approx difference
- 35.16 “GB-number” gap
- OS may show
- 931.32 GiB
- Approx difference
- 68.68 “GB-number” gap
- OS may show
- 1,862.65 GiB
- Approx difference
- 137.35 “GB-number” gap
- OS may show
- 3,725.29 GiB
- Approx difference
- 274.71 “GB-number” gap
File/download examples
| Example | Approx size | Approx count in entered amount |
|---|---|---|
| Photo | 0 GB | 250 |
| MP3 song | 0.01 GB | 125 |
| HD movie | 4 GB | 0 |
| Game install | 80 GB | 0 |
| Phone backup | 120 GB | 0 |
- Approx size
- 0 GB
- Approx count in entered amount
- 250
- Approx size
- 0.01 GB
- Approx count in entered amount
- 125
- Approx size
- 4 GB
- Approx count in entered amount
- 0
- Approx size
- 80 GB
- Approx count in entered amount
- 0
- Approx size
- 120 GB
- Approx count in entered amount
- 0
Watch-outs
- Rounded display can hide tiny precision differences; use exact specs where tolerances matter.
- Make sure the source and destination units are from the same measurement family.
- Drive makers advertise decimal GB/TB; many operating systems show binary GiB/TiB, so the number appears smaller.
- Usable space can be lower after formatting, filesystem overhead, redundancy, snapshots, and reserved space.
Rounded for display. Use exact specs or professional references where precision matters.
Example
1 GB = 1,000 MB using decimal storage units.
Notes
Results are rounded for quick checks. Use official specs or calibrated tools when tolerances, compliance, or safety matter.
Get a better answer from the Data Storage Converter
- Start with the example values to see how the tool behaves.
- Swap in your own numbers, even if they are rough first-pass estimates.
- Change one input at a time so you can see what actually moves the result.
What the result means
The result is the same measurement written in a different unit. The main job is to avoid mental math mistakes and unit mix-ups.
How to use it
Check the unit you are starting with and the unit you actually need before copying the number. Most conversion mistakes are wrong-unit mistakes, not calculator mistakes.
What can change it
Rounding can matter for recipes, shipping, lab work, purchasing, and engineering. Use enough decimal places for the job, then verify the required precision.
Good for
Convert file sizes.
Check next
Compare your result with Data Storage Converter, Number Base Converter, Binary Decimal Hex Converter when you want more context.
Best habit
Run a conservative case and an optimistic case. The gap between them is often more useful than a single answer.
Common uses
- Convert file sizes.
- Compare decimal and binary storage units.
- Estimate storage requirements.
Common questions
Is the Data Storage Converter private?
Yes. CalcShelf calculators run without an account, do not save calculator entries, and do not put raw inputs into shareable URLs or analytics events.
How accurate is the Data Storage Converter?
It uses standard unit relationships and practical rounding. For regulated work, lab use, purchasing specs, or safety-critical tolerances, confirm the required precision.
What should I check after using the Data Storage Converter?
Verify the source unit, target unit, required decimal precision, and any industry-specific rounding rule before copying the number.
Which calculator should I try next?
Use the related calculators below to cross-check the same decision from another angle before you act.
Method behind the estimate
Unit converters use fixed published relationships between measurement units, with rounding chosen for readable everyday results.
Why the detail matters
For purchasing, lab, recipe, shipping, or engineering work, match the target unit system and check whether the destination needs a different precision.
Privacy guardrail
Your calculator values are for you. CalcShelf does not require an account, save calculator entries, put your numbers into shareable URLs, or use raw inputs as analytics events.
Copy or print safely
Use any copy, print, or worksheet controls as local handoff tools for your own notes, supplier calls, lender questions, or implementation checklist. They are there to help you explain the result to a human.
Before acting
Treat the result as a decision draft, not a verdict. Recheck the source numbers, run a downside case, and verify the real-world rule, quote, label, or spec that controls the final answer.
Last reviewed: May 11, 2026. See methodology and editorial policy for formulas, assumptions, rounding, review approach, and limitations. For regulated, lab, shipping, cooking, or engineering use, confirm the exact unit convention and required precision.