🖥️  Free Tool · No Sign-up Required

Windows Server Licensing Calculator

Estimate and compare Standard vs Datacenter licensing costs for your cluster. Based on Microsoft OEM core-pack licensing rules — minimum 16 cores per host, 2-core increments.

⚙️

Cluster Configuration

Enter your physical infrastructure details

🖥️  Physical Infrastructure

Physical servers in the cluster
Total CPU cores (all sockets)
All WS VMs across all hosts
Partner / volume discount (0 = no discount)
%

💰  Pricing (Editable)

Base pack per host, USD
$
Base pack per host, USD
$
Per 2-core pack (remainder), USD
$
Per 2-core pack (remainder), USD
$
🔢

Calculated Licensing Parameters

Auto-computed from your inputs

Standard Edition

Peak VMs per Host (Licensing Basis) —
Standard License Stacking Factor (÷2 per license) —
Base 16-core Packs per Host —
Additional 16-core Packs per Host —
Additional 2-core Packs per Host —

Datacenter Edition

Base 16-core Packs per Host —
Additional 16-core Packs per Host —
Additional 2-core Packs per Host —
—

Calculating…

Standard
—
Total Cost
Datacenter
—
Total Cost
Savings with recommended edition —
📊

Cost Breakdown

Per host and total across cluster

Line Item Standard Datacenter
Base 16-core Packs per Host — —
Additional 2-core Packs per Host — —
License Set Cost per Host (before discount) — —
Stack Factor (Standard = ÷2 VMs / DC = ×1) — ×1
Number of Hosts —
Discount Applied —
Total Cluster Cost — —
⚠️ Disclaimer: This calculator is for estimation and planning purposes only. Pricing may vary by region, channel, and Microsoft licensing agreements. Always verify final costs with your Microsoft licensing partner or reseller. Not affiliated with Microsoft Corporation.
🪪

CAL Advisor — Grow Your Deal with Client Access Licenses

Every user or device accessing Windows Server services requires a CAL. Adding CALs at the point of sale properly licenses the customer and significantly increases deal value.

👥

Client Access Configuration

Answer the questions below to get the right CAL recommendation

Count all users who will access file shares, print, Active Directory, or any WS service
Count PCs, laptops, workstations, thin clients, tablets — not servers
This is the key question for User CAL vs Device CAL
💡

CAL Type Recommendation

Based on your usage pattern

✓
👤
User CAL
One license per named user.
User can access from any device.
✓
🖥️
Device CAL
One license per device.
Any user can use that device.
💡
User CAL Recommended Loading…
👤 User CAL — Best when…
  • Each employee has their own named account
  • Users roam between devices (laptop, desktop, home)
  • More devices than users (BYOD environments)
  • Remote / VPN workers with multiple endpoints
  • Mobile workforce accessing from smartphones
🖥️ Device CAL — Best when…
  • Shared PCs used by shift workers (2–3 shifts)
  • Kiosks, POS terminals, factory floor stations
  • More users than devices (hot-desking)
  • Seasonal workers or contractors on shared equipment
  • Classrooms with shared student workstations
💰

CAL Pricing (Editable)

Adjust for your region and channel

Per named user, USD
$
Per device, USD
$

📈 Revenue Impact — Deal with CALs Included

Adding CALs at the point of sale for proper licensing

Customer Profile
  • Loading…
Component Value
WS 2025 (server) —
CALs —
Total deal value —
Additional Revenue
—
from CALs alone
Deal Size Increase
—
vs server-only deal
📊

CALs generate significant uplift over the base server license, making them a critical upsell at the point of sale to both grow revenue and properly license the customer.

💰

Why OEM Saves Customers Money — Channel Comparison

Help customers understand the total cost difference between OEM, Open Value Subscription (SA mandatory, paid upfront for 3 years), and CSP perpetual licensing.

✓ LOWEST TCO
🏷️

OEM License

Tied to hardware at point of sale

Payment model One-time at purchase
Software Assurance Not required
Renewal after 3 years None — perpetual
Typical discount vs MSRP ~35% (hardware bundle)
3-year savings vs OVS —
✓ No SA cost — zero additional spend after purchase
✓ Perpetual ownership — keep license forever
✓ Bundled with server hardware at point of sale
✓ Lowest total acquisition cost
✓ One-Stop Support — hardware + software from same vendor
✗ No upgrade rights
OPEN VALUE SUB.
📋

Open Value Subscription

SA mandatory — paid upfront for 3 years

Payment model Upfront for 3 years
Software Assurance Mandatory (3-yr upfront)
SA cost ~25% of MSRP × 3 years
Renewal after 3 years Optional (keep or drop SA)
3-year extra cost vs OEM —
✓ Latest version rights (upgrade rights included)
✓ Transferable between hardware
✓ Downgrade rights included
✓ After 3 yrs: can drop SA and keep perpetual license
✗ SA paid upfront for full 3 years — significant cash outlay
✗ Higher total cost than OEM for same license
CSP PERPETUAL
☁️

CSP Perpetual License

Buy-once via Cloud Solution Provider

Payment model One-time at MSRP
Software Assurance Not required
Renewal after 3 years None — perpetual
Typical discount vs MSRP Minimal (0–10%)
Extra cost vs OEM —
✓ Perpetual ownership
✓ Transferable between hardware
✓ Flexible — no hardware dependency
✗ No SA — no upgrade rights
✗ Priced at MSRP — more expensive than OEM
✗ No hardware bundle discount
📊

OEM Cost Advantage — Same Configuration, 3 Channels

Based on calculator results · OEM = CSP −30% · OVS = CSP +50% SA upfront

—
OEM
Hardware bundle
—
CSP
Perpetual
—
OVS
License + SA
License cost
Software Assurance (OVS only)
OEM saves vs CSP
—
OEM saves vs OVS
—
Config
—
💡 OEM = CSP price −30% (hardware bundle). OVS = CSP license + 50% SA (paid upfront 3 years, then perpetual). After 3 years the OVS customer keeps the license and can optionally renew SA.