v2.1

FuelGauge

YOU PAY $100/MO FOR CLAUDE.
$36 OF THAT IS WASTED.

budget: 12% · pace: 2.4x · runs out: 6h · status: CRITICAL

budget: 67% · pace: 0.95x · runs out: after reset · status: ON PACE

FuelGauge tracks your Claude budget in real time. One glance: what's left, when you'll hit the wall, and whether you need to speed up or slow down.

Free forever. No account needed.

⛽ FuelGauge Pro

67%

✓ On pace. ~12 pts/day available until reset.

All Models · 7-day

67 %

Resets in 5d 2h · Pace 1.02x

Session · 5h

42 %

Sonnet · 7d

73 %

← All Models · 7-day

Resets Mar 31

⚠ Slow down — 6.2 pts above ideal pace. Budget runs out at 11:40 PM.

1.3x

Pace

2d 4h

Runs out

+8 pts

Delta

Track

Know what's left

Real-time usage gauge for your Claude subscription. One click in your toolbar. One number. No digging through settings.

Predict

See when you'll run out

Depletion ETA based on your actual pace. At 1.3x, you'll hit the wall in 2 days. At 0.8x, you'll waste 20%. Both cost you money.

Optimize

Stop wasting budget

Most tools only warn when you're running out. FuelGauge catches under-use too. $100/mo at 64% = $432/year wasted. It tells you to push before the window closes.

The math

Plan	Monthly	Avg use	Wasted/yr	Saved/yr
Claude Pro	$20	~60%	$96	$60
Claude Max 5x	$100	~64%	$432	$252
Claude Max 20x	$200	~42%	$1,392	$1,032

FuelGauge costs $9. Once. Average Max 5x user recovers $252/year. Pays for itself in 3 days.

What users say

“I was burning through my Max plan in 4 days every week. FuelGauge showed me my pace was 1.8x. Now I spread it out and never hit the wall.”

Marcus T. · backend engineer

“Found out I was using 42% of my Max 20x. That’s $116/month wasted. Downgraded to 5x, saved $100/month.”

Sarah K. · indie hacker

“The under-utilization alert is what sold me. 3 days left, 60% budget remaining. FuelGauge told me to push harder. Got my money’s worth for the first time.”

Jean-Baptiste M. · technical writer

“Session reset alerts alone are worth the $9. I used to find out my 5h window reset by accident. Now I get a ping and jump right back in.”

Ana R. · senior engineer

1,847 installs this week · 4.8/5 avg rating · Avg user recovers $21/mo in wasted budget

Free to start. $9 to never worry again.

	Free	Pro
	$0forever	$9one-time, lifetime
Dashboard
Usage gauge (% remaining)	✓	✓
3-tile overview (Session / All Models / Sonnet)	✓	✓
Pace tracking (ratio + delta)	✓	✓
Depletion ETA	✓	✓
Advice banner (on pace / slow down / critical)	✓	✓
Under-utilization detection	✓	✓
Dynamic toolbar icon + badge	✓	✓
Charts & Analytics
Historical charts (7-day + 5-hour)	—	✓
Detail view (chart + metrics + context)	—	✓
Ideal pace overlay	—	✓
Alerts
Desktop notifications	✓	✓
Push notifications (ntfy)	—	✓
Session reset alerts	—	✓
Configurable threshold (5-50%)	—	✓
Data
Local history (30 days)	✓	✓
Cloud sync (multi-browser, restore, backup)	—	✓
Polling frequency	30 min	1 min
Coming soon
Firefox extension	✓	✓
Export CSV	—	✓
Slack / Discord alerts	—	✓
Budget planner (weekly goals)	—	✓

FAQ

How does FuelGauge access my usage data?

FuelGauge reads the same usage data that Claude shows on your settings page. It uses your active session cookie to fetch your usage stats from Claude's API. No password, no login, no third-party server. Everything stays in your browser.

Do I need to be logged into Claude?

Yes. FuelGauge uses your active Claude session. If you're logged into claude.ai in your browser, it works automatically. If you're logged out, it will show an error and ask you to log in.

What data does FuelGauge store?

Usage history (percentages and timestamps) is stored locally in your browser via chrome.storage. On the Free plan, your data never leaves your machine. Pro users can opt into Cloud Sync to backup their data and access it across browsers — but it's always opt-in, never automatic.

What are the three tiles on the dashboard?

All Models (7-day window covering all Claude models), Session (your current 5-hour rolling session), and Sonnet (7-day window for Sonnet specifically). Each shows percentage remaining, pace, and depletion estimate.

What does "pace" mean?

Pace compares your actual consumption rate to the ideal rate. At 1.0x you're spending your budget evenly across the period. Drop below that and you'll waste what's left at reset. Go above and you'll hit the limit early.

Why does FuelGauge track under-utilization?

Most tools only warn when you're running out. But if you're paying $20/mo and only using 40% of your budget, that's $12/mo wasted. FuelGauge tells you to push harder in the days before reset rather than losing the headroom.

What's the difference between Free and Pro?

Free gives you the real-time gauge, pace tracking, and depletion ETA. Pro adds historical charts, push notifications (via ntfy), session reset alerts, high-frequency polling down to 1 minute, and cloud sync across browsers. Pro is a one-time $9 payment, not a subscription.

How much money can FuelGauge save me?

Depends on your plan. A Max 5x user at 64% utilization wastes $432/year. FuelGauge’s pace tracking gets most users to 85-90% utilization. That's roughly $21/month back. The $9 Pro pays for itself in 3 days. Even on the free plan, the gauge alone prevents the “hit the wall mid-session” moment that costs you an hour of waiting.

Does it work with ChatGPT or Gemini?

Not yet. FuelGauge currently supports Claude (Pro, Max, Team) only. Other providers are on the roadmap.

Learn more

Claude Usage Limits Explained

Sessions, models, and reset windows demystified.

How Much Does Claude Cost Per Message?

Real cost analysis across Pro, Max, and API.

The 5-Hour Session Window

How rolling sessions work and how to optimize them.

What Happens When You Hit the Limit

Error messages, recovery times, prevention strategies.

Claude Pro vs Max vs Team