Example data table
| Period | Start backlinks | End backlinks | New links | Days | Velocity (per week) |
|---|---|---|---|---|---|
| Jan 01–Jan 07 | 1,240 | 1,268 | 28 | 7 | 28.00 |
| Jan 08–Jan 14 | 1,268 | 1,290 | 22 | 7 | 22.00 |
| Jan 15–Jan 21 | 1,290 | 1,335 | 45 | 7 | 45.00 |
| Jan 22–Jan 28 | 1,335 | 1,360 | 25 | 7 | 25.00 |
Formula used
- New Links = End Backlinks − Start Backlinks (or manual value)
- Units = Days, or Days/7, or Days/30.4375
- Velocity = New Links ÷ Units
- RD Velocity = New RDs ÷ Units
- Quality Multiplier = 0.60 + 0.40×(Quality/100)
- Follow Multiplier = 0.70 + 0.30×(Dofollow Ratio)
- Score = Velocity × Quality Multiplier × Follow Multiplier
How to use this calculator
- Set a time range and choose per-day, per-week, or per-month units.
- Enter start and end totals for backlinks and referring domains.
- If you only know growth, fill the manual new links fields.
- Optional: add dofollow/nofollow and a quality estimate for scoring.
- Optional: enable a previous period to measure velocity change.
- Optional: paste a period log to summarize variation and peaks.
- Press Submit to see results above the form, under the header.
- Download CSV or PDF for sharing, audits, or documentation.
Link velocity signals for audits
Link velocity is the rate of new backlinks acquired over a defined window. Tracking it helps validate outreach performance, diagnose reporting gaps, and avoid surprise volatility in authority metrics. When you compare start and end totals, the calculator normalizes growth into a per‑day, per‑week, or per‑month pace, which makes different campaigns comparable. Pairing velocity with referring‑domain velocity highlights whether gains come from diverse sites or repeat links from the same sources.
Benchmarks by cadence and channel
Reasonable velocity ranges depend on niche competition, site age, and the acquisition channel. Editorial mentions and digital PR often arrive in bursts, while steady outreach and content promotion tend to produce smoother weekly numbers. Use the unit selector to match your reporting rhythm, then set a threshold that reflects your historical median plus an buffer. A sudden jump above the threshold is not automatically bad, but it should be explained by a documented activity.
Spike detection and risk controls
Rapid surges can be healthy during a successful press cycle, but unexplained spikes deserve review. Check whether new links cluster on one domain, one template page, or one anchor pattern. Confirm that tools did not change their indexing method or include lost-and-found links. On the downside, negative growth can happen when pages are removed or when noindex rules change. The calculator flags declining periods so you can investigate before trends compound.
Quality weighting for context
The weighted velocity score adds two simple modifiers: an average quality estimate and the dofollow ratio. This keeps the headline velocity grounded when a period contains many low‑value links or an unusual nofollow mix. Quality is scaled gently so the score stays comparable across teams; it is a directional indicator, not a ranking signal. Use the score to prioritize review: high velocity plus high weight deserves celebration; high velocity with low weight needs scrutiny.
Reporting cadence and action loop
Operationally, log weekly or monthly gains in the period log to see variation, averages, and peaks. Stable campaigns typically show a narrow spread, while opportunistic PR shows higher standard deviation. Share the CSV in retrospectives, attach the PDF to client updates, and record notes about what caused outliers. Over time, your baseline velocity becomes a planning input for content calendars, outreach targets, and risk limits.
FAQs
1. What is link velocity in this tool?
It is new backlinks divided by the selected units in your date range. Units are days, weeks (days/7), or months (days/30.4375). Use it to compare campaigns on the same scale.
2. Should I enter start/end totals or manual new links?
Use start and end totals when you trust your tool’s totals for the dates. Use manual new links when you already have period growth from another report. Manual values override start/end differences.
3. Why track referring-domain velocity too?
Backlinks can grow from repeat links on the same site. Referring-domain velocity shows source diversity, which is often more stable and harder to inflate. Compare both to spot concentration risk.
4. What does the weighted velocity score mean?
It adjusts velocity using a quality estimate and the dofollow ratio. Higher scores suggest more impactful growth, while lower scores indicate weaker periods. Treat it as a comparative KPI, not a ranking factor.
5. How should I set the velocity threshold?
Start with your recent median velocity for the same unit, then add a buffer based on your normal variation. If you paste period logs, use the observed peaks and standard deviation to choose a practical alert line.
6. Can a high velocity be harmful?
Yes, if it is unexplained, highly concentrated, or tied to low-quality sources. Review spikes for patterns, sudden anchor changes, or tool measurement changes. Document legitimate causes like PR coverage or partnerships.