Telecom Tools & Calculators
Free, practical tools for business communications — price international and everyday calls, measure raw and billed duration, estimate VoIP call quality, and plan call-centre wait times and staffing with real Erlang C math.
🌍 International Call Cost Calculator
Price a call abroad from its length and a destination zone's per-minute rate or your own custom rate, add a connection fee, and compare two rates to find the cheaper option
📟 Call Cost Calculator
Work out the cost of a single call from its duration and per-minute rate, with an optional connection fee and tax — total charge plus the effective per-minute cost for VoIP, mobile, or landline
⏱️ Call Duration Calculator
Get the exact duration between a call's start and end time in hh:mm:ss, and the billed duration under per-second, per-6-second, or per-minute rounding
🎧 Call Quality Score Calculator
Estimate VoIP call quality from latency, jitter, and packet loss — a MOS score (1.0–4.5) and a Poor/Fair/Good/Excellent rating via the simplified ITU-T G.107 E-model
📞 Call Wait Time Calculator
Model a call queue with Erlang C — from call volume, average handle time, interval, and agents, get the offered load, probability of waiting, average speed of answer, and service level
👥 Call Center Staffing Calculator
Size your team with Erlang C — enter call volume, handle time, interval, and a service-level target to get the agents required, plus the resulting occupancy and average speed of answer