https://tkpg.co.uk
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
87
GRADE
B
FIX
0
REVIEW
3
PASS
4
INFO
1
Checks
84 PASS 3 REVIEW
BGreen HostingGreen (hosting)REVIEW
Green Hosting
Green (hosting)
Green (hosting)
Info::
Kualo uses renewable energy
Info::
Kualo: Verified by the Green Web Foundation
Info::
Green hosting status based on known provider commitments
Green hosting detection uses a curated database of provider renewable energy commitments. This is not a real-time verification. For authoritative checks, visit thegreenwebfoundation.org.
Green Hosting✓ Green Hosted
Hosting Kualo✓CDN Not identified✗
Kualo: Verified by the Green Web Foundation
Based on known provider commitments. Verify at thegreenwebfoundation.org
BCarbon Budget34th percentileREVIEW
Carbon Budget
34th percentile
34th percentile
Info::
0.44g CO2 — below the sustainability target of 0.50g
Cleaner than an estimated 66% of websites analyzed. This page meets the Web Sustainability Guidelines target.
Info::
Estimated 34th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
0.44g
34th percentile
Cleaner than 66% of websites
✓ Below the Web Sustainability Guidelines target
vs Median 26% cleaner ✓
vs Target 12% cleaner ✓
BWeb Font Weight VariantsNo detectable Google Fonts weightsREVIEW
Web Font Weight Variants
No detectable Google Fonts weights
No detectable Google Fonts weights
Info::
No detectable Google Fonts weights
The analyzer detects font weights via Google Fonts URL parameters (~70% of font-using sites). Self-hosted fonts and non-Google CDN fonts aren't visible to URL-based detection. If you self-host fonts, manually audit how many @font-face weights you ship -- 2-3 weights per family is typically enough; 5+ is usually unused payload.
ACO2 Per Page Load0.44g CO2 per viewPASS
CO2 Per Page Load
0.44g CO2 per view
0.44g CO2 per view
Info::
0.44g CO2 per page view
This page transfers 1.9 MB, producing an estimated 0.44g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.01g, network 0.09g, end-user device 0.34g.
Got: 0.44g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 53.1 kg CO2/year
With 10,000 page views per month, this page would generate approximately 53.1 kg of CO2 annually — equivalent to charging 6633 smartphones.
Info::
Green hosting reduces data center emissions
0.44g
Carbon Footprint per page view
✓ Below sustainability target (0.50g)
Cleaner than 66% of websites
Sustainable Web Design model v4 · Page size: 1.9 MB
Your site
0.44g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.01g
Network
0.09g
End-user device
0.34g
At 10,000 monthly views: Monthly: 4.4 kg · Annual: 53.1 kg · ≈ 6633 smartphone charges
A+Repeat Visit Weight98% cachedPASS
Repeat Visit Weight
98% cached
98% cached
Info::
98% reduction on repeat visits
Returning visitors download only 34 KB (vs 1913 KB first visit). 88 of 91 resources are served from browser cache, saving 0.43g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 0.44g)
First visit
1913 KB
Repeat visit
34 KB
98% reduction on repeat visits
Saving 0.43g CO2 per returning visitor
88 resources served from cache · 3 resources re-downloaded
A+Transfer Efficiency90% efficientPASS
Transfer Efficiency
90% efficient
90% efficient
Info::
Transfer efficiency: 90%
Only 185 KB of potential savings identified. Your page is well-optimized for size.
Total waste: 185 KB (10% of page weight)
Unused JS 185 KB
0.04g unnecessary CO2 per visit
Actual transfer 1913 KB
Theoretical minimum 1727 KB
Potential savings 185 KB (0.04g CO2)
See Deep Analysis sections above for specific optimizations.
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
Whether the site is served from green-energy infrastructure
Green Hosting
This site is hosted on green energy infrastructure
Provider: Kualo
Image Optimization60 images, 170 KB total, 0 KB wastedINFO
Image Optimization
60 images, 170 KB total, 0 KB wasted
Image Optimization Audit
Total Images
60
Total Size
170 KB
3 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.