VPS Sizing Calculator
Estimate virtual private server requirements for CPU, RAM, SSD storage, bandwidth, IOPS, and network throughput based on workload and traffic.
Current setup score
78/100
Current setup is close to limits. Extra headroom or a bigger plan is advised.
Scored on Recommended: 6 vCPU / 8 GB (Likely undersized)
Can handle setup
At risk
Projected response
493 ms
CPU pressure
68%
RAM pressure
50.9%
Simulation tunable via mode, refresh rate, and metric set controls.
1) Workload setup
Inputs2) Traffic inputs
Load3) Storage and safety margin
Capacity4) Plan tiers
3 optionsRecommended
Likely undersized
100 GB SSD
Value-leaning
Likely undersized
100 GB SSD
Extra headroom
Balanced fit
100 GB SSD
5) Model notes
Assumptions
- - Targets ~65% CPU utilization at peak
- - Assumes basic cache (http + browser) with Node.js runtime
- - Includes 30% headroom and 12-month storage growth
Final recommendation
Likely undersizedPlan size
6 vCPU / 8 GB RAM
100 GB SSD | CPU Optimized
Peak RPS
343 req/s
Avg RPS
0.12 req/s
Peak concurrency
120 users
Network target
1000 Mbps
IOPS target
911
CPU target
6 vCPU
Realtime quick stats
StableReq/s
0 req/s
CPU
0.0%
RAM
0.0%
Network
0 Mbps
Latency
0 ms
Uptime 0s | Dropped 0 req
VPS sizing calculator: how to estimate CPU, RAM, storage, and bandwidth
Use this VPS sizing calculator to translate traffic, response time, and workload type into a practical VPS plan size. It is useful for WordPress sites, APIs, SaaS apps, small databases, and Docker deployments when you want a fast starting point before load testing.
What this estimator helps you plan
- vCPU and RAM sizing for peak concurrency and latency targets.
- SSD storage plus growth and headroom buffer.
- Bandwidth transfer and network throughput targets.
- Plan tiers so you can compare providers with similar specs.
Next step: compare plans on our VPS providers comparison page.
FAQ
How do I choose VPS CPU and RAM?
Start with peak concurrency and response-time goals. If CPU pressure is high, add vCPU; if memory pressure is high, add RAM. Keep headroom for spikes and background jobs.
How much bandwidth does a VPS need?
Bandwidth depends on transfer per visit and total requests. Media-heavy pages and large API responses often need more transfer and higher throughput.
Is this a replacement for load testing?
No. Use it to get a safe baseline VPS size, then validate with monitoring and load tests for your real stack.
Do I need NVMe or extra IOPS?
If your app is database-heavy or uses lots of small reads and writes, faster storage and higher IOPS can matter more than extra vCPU.
Sticky recommendation
6 vCPU / 8 GB