Kardashev Meter

Humanity's current K-value from static energy data. Adjust the growth rate and see when we reach K1 (planetary), K2 (stellar), and K3 (galactic). Speculative framework — extrapolation labelled.

⚠ Speculative extrapolation
Epistemic note
The Kardashev Scale (1964) is a heuristic framework, not a physical law. K1/K2/K3 milestones are definitional, not inevitable. Growth rates are extrapolation only — they do not account for resource limits, civilisational collapse, or technological discontinuity. All year estimates should be treated as order-of-magnitude.
0.724
Humanity's Kardashev value · 2025
K1
K2
K3
K0 (now) K1 — planetary K2 — stellar K3 — galactic
Current Energy Dataset
580 EJ

IEA World Energy Outlook 2024: ~580 EJ/yr (2023 data)
580 EJ/yr = 1.84 × 10¹³ W average power

Growth Rate Scenario
2.0 %/yr
Projected Milestones
Kardashev Ladder Workflow → Dyson Swarm BZ–Kardashev Matrioshka Brain

K-value Formula

Sagan (1973) modified Kardashev's original three-point scale to a continuous one: K = (log₁₀(P) − 6) / 10 where P is power in watts. This gives K=1 at 10¹⁶ W, K=2 at 10²⁶ W, K=3 at 10³⁶ W. Some sources use slightly different anchors; this tool uses Sagan's formulation.

Energy Anchors

K1: P_K1 = 1.74 × 10¹⁷ W (Earth total solar insolation). K2: P_K2 = 3.86 × 10²⁶ W (total solar luminosity). K3: P_K3 ≈ 4 × 10³⁷ W (Milky Way total luminosity estimate, ~10¹¹ stars). Anchors are definitional, not fixed by the original paper.

Growth Model

Compound annual growth: P(t) = P₀ × (1 + r)ᵗ. Year to reach milestone solved by inverting: t = log(P_milestone/P₀) / log(1+r). Base year: 2025.

Data Source

IEA World Energy Outlook 2024 — Total Primary Energy Supply 2023: ~580 EJ/yr. 1 EJ = 10¹⁸ J; 580 EJ/yr ÷ 3.156 × 10⁷ s/yr ≈ 1.84 × 10¹³ W.

Tool version 1.0 · 2026-06-10 · Code: MIT · Prose: CC BY 4.0 · Register: speculative. Part of the Kardashev Ladder workflow.