Phase · Independent review

Best cloud migration cost calculators in 2026

We tested every cloud migration cost calculator we could find. Most are lead-gen tools in disguise. Here is an honest breakdown of which actually help you plan your project.

Methodology

What we tested and how we scored

Independent

Not vendor-owned or consulting-shop

No email

Results without submitting contact

One-time costs

Covers project labour, egress, parallel running

Hidden costs

Documents the line items budgets miss

Multi-cloud

Covers AWS, Azure, GCP

Methodology

Transparent about data sources

Update cadence

Pricing data refreshed within 12 months

UX clarity

Plain inputs, plain outputs

Reviews

8 calculators reviewed

MigrationCost.com

This site★★★★★

Independent multi-cloud migration cost estimator covering one-time project costs, egress fees, parallel running, hidden costs, and ROI analysis. No email required.

Pros

✓Covers one-time migration costs (not just running costs)
✓Independent, no vendor affiliation
✓No email required
✓10 hidden costs documented
✓All 3 major cloud providers

Cons

·Requires approximate workload count
·Estimates based on industry averages, not your specific config

VerdictBest overall for pre-migration budgeting

CostSignals.com

★★★★★

Visit ↗

Clean B2B calculator with 6 inputs. Outputs low/avg/high range, timeline, monthly cloud cost, 3-year TCO savings. Cites Gartner / McKinsey.

Pros

✓Clean simple UI
✓No email required
✓Multi-cloud
✓Cites methodology

Cons

·Does not separate one-time vs ongoing cloud spend
·No hidden costs breakdown
·Less granular

VerdictGood for quick estimates, less detailed

AWS Pricing Calculator

★★★★★

Visit ↗

Official AWS tool. Excellent for modelling AWS ongoing costs. Does not include migration project costs. Biased toward making AWS look favourable.

Pros

✓Most detailed AWS pricing
✓Always up-to-date
✓Free
✓No email

Cons

·Only models running costs
·AWS-only
·AWS-biased
·Complex

VerdictBest for AWS running costs, not project costs

Azure TCO Calculator

★★★★★

Visit ↗

Microsoft's official TCO comparison tool. Best for modelling on-premise vs Azure. Includes Hybrid Benefit. Does not model migration project costs.

Pros

✓Includes Azure Hybrid Benefit
✓Microsoft-stack specific
✓Free
✓No email

Cons

·Only models running costs
·Azure-only
·Azure-biased

VerdictBest for Microsoft shops evaluating Azure running cost

Google Cloud Pricing Calculator

★★★★★

Visit ↗

GCP's granular service pricing calculator. Not a migration tool. Most useful for pricing BigQuery, GKE, and other GCP-specific services.

Pros

✓Granular GCP pricing
✓Free
✓No email

Cons

·Not a migration tool
·GCP-only
·Running costs only

VerdictUseful for GCP running costs only

ValueCoders Calculator

★★★★★

Visit ↗

Consulting shop lead-generation tool. Single-page form. Results require submitting contact details.

Pros

✓Provides ballpark number

Cons

·Requires email
·Lead-gen focused
·Consulting shop bias
·Not independent

VerdictLead-gen tool, expect a sales call

Medha Cloud Calculator

★★★★★

Visit ↗

Focused on email / M365 migration only. Not useful for infrastructure migration.

Pros

✓Niche M365 expertise
✓Free

Cons

·Email migration only
·Not infrastructure
·Single-vendor focus

VerdictM365 migrations only

Oski.site

★★★★★

Visit ↗

Independent blog with detailed cost coverage. No interactive calculator. Long-form content rather than tooling.

Pros

✓Independent
✓Detailed prose coverage
✓Cites real numbers

Cons

·No tool
·No interactive calculator

VerdictReference reading, not a calculator

Summary table

All 8 calculators at a glance

Calculator	Independent	No email	One-time costs	Hidden costs	Multi-cloud
MigrationCost.comUs	✓	✓	✓	✓	✓
CostSignals.com	✓	✓	✗	✗	✓
AWS Pricing Calculator	✗	✓	✗	✗	✗
Azure TCO Calculator	✗	✓	✗	✗	✗
Google Cloud Pricing Calculator	✗	✓	✗	✗	✗
ValueCoders Calculator	✗	✗	✓	✗	✓
Medha Cloud Calculator	✓	✓	✓	✗	✗
Oski.site	✓	✓	✓	✓	✓

Decision tree

Which calculator should you use?

Just want a quick number including hidden costs?
MigrationCost.com or CostSignals
Modelling AWS running costs in detail?
AWS Pricing Calculator + add hidden costs separately
Microsoft shop evaluating Azure?
Azure TCO Calculator + Hybrid Benefit Calculator
Comparing all three providers head-to-head?
MigrationCost.com /compare
Need break-even / payback timeline?
MigrationCost.com /roi
Email / M365 migration only?
Medha Cloud Calculator

FAQ

Calculator questions

Q. What is the best free cloud migration cost calculator?

For a free, independent calculator that covers one-time migration costs AND ongoing cloud costs without requiring an email address, MigrationCost.com is the most comprehensive option. For ongoing cloud running costs only (not migration project costs), AWS Pricing Calculator and Azure TCO Calculator are the most detailed but both are vendor-biased and do not cover migration project costs.

Q. Do AWS and Azure TCO calculators show migration costs?

No. AWS Total Cost of Ownership Calculator and Azure TCO Calculator model ongoing cloud running costs only, not the one-time migration project cost (labour, consulting, egress, parallel running, retraining). They are useful for comparing post-migration cloud costs vs on-premise running costs but always understate the true total cost of migration.

Q. Which cloud migration calculator is the most accurate?

No calculator can be perfectly accurate without knowing your specific workload details. The most comprehensive independent calculators are MigrationCost.com and CostSignals.com. For raw compute pricing detail the vendor-native calculators (AWS, Azure, GCP) are most up-to-date but require combining with a separate hidden costs estimate.

Run our calculator →Compare AWS / Azure / GCP →Break-even calculator →