How to Use This Tool
Convert sample target, traffic and eligibility into a calendar estimate. Estimate landing page test duration from required visitors, daily sessions, eligibility, traffic allocation and weekday coverage.
The decision this tool supports
A sample-size target is incomplete until eligibility, traffic allocation and weekends are converted into elapsed time. This page keeps the decision bounded to calendar days required and the supporting outputs shown beside it. Page Test Duration does not import an account, infer a market rate, or silently substitute an industry average.
Inputs and units
The Page Test Duration calculation uses Required visitors per variant, Variants, Daily eligible sessions, Traffic allocated to test, Active test days per week. Keep all money values in one currency and all time, distance, mass, energy or volume entries in the unit printed beside the field. Mixing Page Test Duration scopes can produce a plausible number with the wrong meaning.
- Required visitors per variant is entered in visitors.
- Variants is entered in variants.
- Daily eligible sessions is entered in sessions/day.
- Traffic allocated to test is entered in %.
- Active test days per week is entered in days/week.
Formula and worked check
Visitors needed = target per variant × variants; active days = visitors needed ÷ (eligible sessions × traffic allocation); calendar days adjust for active weekdays. Two variants needing 5,000 visitors each, at 1,440 test visitors daily, require 6.94 active and calendar days. The Page Test Duration default is an executable known-answer case, not a benchmark or recommendation. Change one input and verify that the direction of calendar days required still matches the stated relationship.
How to interpret the result
Plan at least the displayed duration and avoid stopping early solely because a provisional result looks favorable. The additional Page Test Duration outputs expose the denominator, comparison, capacity or reverse value needed to audit the primary result instead of presenting one unexplained number.
Assumptions
- The required sample per variant was determined separately.
- Traffic splits evenly across variants.
- Daily eligible traffic is stable.
Save the Page Test Duration input values and date with any material decision. A later Page Test Duration rerun is reproducible only when the same assumptions and units are available.
Limitations and safety boundary
It does not calculate statistical sample size or account for traffic growth, bot filtering, novelty effects and data-quality loss. Page Test Duration is an estimate and cannot replace a contract, local code, licensed professional, calibrated measurement, lender statement or platform report where one governs the decision.
Source and privacy
The Page Test Duration definition or rule was checked against Google Ads Help — About reach and frequency on 2026-08-26. Recheck Google Ads Help — About reach and frequency when a specification or policy behind Page Test Duration can change. Page Test Duration arithmetic runs in this browser tab; ecech does not receive the values through a calculation API.
Sources & assumptions
Tool Spec v2 · verified 2026-08-26. Platform rules and fees can change; the editable inputs remain authoritative for your account.
Official references
- Google Ads Help — About reach and frequency (checked 2026-08-26)
Model assumptions
- The required sample per variant was determined separately.
- Traffic splits evenly across variants.
- Daily eligible traffic is stable.
- It does not calculate statistical sample size or account for traffic growth, bot filtering, novelty effects and data-quality loss.
