Work out sim data usage instantly with clear inputs, formula shown and shareable results.
Pooled data plans aggregate every SIM's allowance, so a few heavy devices are absorbed by many light ones. Total usage is SIM count times daily consumption across the 30.44-day average month, and anything above the pool is billed at the overage rate — which is typically several times the in-plan cost per gigabyte.
Pooled usage
monthly GB = SIMs x MB per day x 30.44 / 1000; overage = max(0, usage - pool); charge = overage x rate
Because usage varies. Per-SIM caps mean some devices are throttled while unused allowance is wasted elsewhere; pooling smooths that out.
Per-SIM caps within the pool, alerting on daily usage anomalies, and blocking non-essential destinations. A single misbehaving device can consume the whole pool.