Analog ↔ Digital Reference Level Calculator
Convert between dBu and dBFS using the SMPTE, EBU or Japanese studio alignment — know exactly what +4 dBu means in your DAW.
US studios align +4 dBu (1.228 V) to −20 dBFS (SMPTE RP155); Europe aligns 0 dBu to −18 dBFS (EBU R68). The same console output therefore hits a US-calibrated and EU-calibrated interface 2 dB apart — the eternal source of 'why is my level different in this studio' confusion.
Rule / Formula
Convert between dBu and dBFS using the SMPTE, EBU or Japanese studio alignment — know exactly what +4 dBu means in your DAW.
About Analog ↔ Digital Reference Level Calculator
Convert between dBu and dBFS using the SMPTE, EBU or Japanese studio alignment — know exactly what +4 dBu means in your DAW. US studios align +4 dBu (1.228 V) to −20 dBFS (SMPTE RP155); Europe aligns 0 dBu to −18 dBFS (EBU R68). The same console output therefore hits a US-calibrated and EU-calibrated interface 2 dB apart — the eternal source of 'why is my level different in this studio' confusion.
How to use Analog ↔ Digital Reference Level Calculator
- 1Enter your values into the fields in Analog ↔ Digital Reference Level Calculator.
- 2The result and any pass/fail verdict update instantly as you type — no button to press.
- 3Check the substituted formula and worked example to see exactly how the result was derived.
- 4Copy or note the result for your spec, delivery or planning.
Why use Analog ↔ Digital Reference Level Calculator?
- ✓Runs entirely in your browser with instant, private results — no data leaves your device.
- ✓Built on a published reference: SMPTE RP 155.
- ✓Shows the governing formula and a worked example, so you can trust and check every result.
- ✓100% free with no sign-up, no watermark and no usage limits.
- ✓Works on any device — desktop, tablet or phone — and keeps working offline once loaded.
Frequently asked questions
What does Analog ↔ Digital Reference Level Calculator do?+
Convert between dBu and dBFS using the SMPTE, EBU or Japanese studio alignment — know exactly what +4 dBu means in your DAW. US studios align +4 dBu (1.228 V) to −20 dBFS (SMPTE RP155); Europe aligns 0 dBu to −18 dBFS (EBU R68).
Is my data private?+
Yes. Analog ↔ Digital Reference Level Calculator runs entirely in your browser — your inputs are never uploaded, stored or logged.
What standard or source is Analog ↔ Digital Reference Level Calculator based on?+
It follows SMPTE RP 155; EBU R 68. Always confirm against the current official document, as specifications and rates can change.
What formula does it use?+
Analog ↔ Digital Reference Level Calculator uses: SMPTE: dBFS = dBu − 24; EBU: dBFS = dBu − 18; Japan: dBFS = dBu − 20; V = 0.7746 × 10^(dBu/20). The tool shows this formula with your own numbers substituted so you can verify the result.
Is Analog ↔ Digital Reference Level Calculator free to use?+
Yes — it is completely free with no account, no sign-up and no usage limits. There is no watermark and no paywall.
Embed Analog ↔ Digital Reference Level Calculator on your website
Want Analog ↔ Digital Reference Level Calculatoron your own site? Paste this snippet into any HTML page — it's free, with no API key or sign-up. The tool loads in an iframe and keeps working exactly as it does here.
<iframe src="https://tooljolt.com/tools/analog-digital-reference-level-calculator" width="100%" height="640" style="border:1px solid #e5e7eb;border-radius:12px;max-width:680px" title="Analog ↔ Digital Reference Level Calculator — ToolJolt" loading="lazy"></iframe>Related Broadcast tools
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