Price per kilometer of ordinary optical fiber core

As of mid-2026, the average price of single-mode optical fiber per core per kilometer ranges from approximately $5.50 to $9.70, depending on fiber type and market conditions.Current Market PricingStandard G.652.D fiber is averaging around $5.50 per core kilometer, with some quotes reaching $6.90 due to supply constraints and high demand .Specialty G657A2 fiber, commonly used for bend-insensitive applications, is trading between $8.30 and $9.70 per core kilometer in the spot market .The $25 per kilometer figure sometimes cited reflects spot market volatility for immediate delivery of G657A2 bare fiber, influenced by urgent projects in AI, data centers, and military applications .Factors Affecting PriceFiber Type: Single-mode fibers (G.652.D, G657A2) are more expensive than multi-mode fibers due to higher performance and longer transmission distances .Installation Method: Underground deployment with trenching is significantly more costly than aerial or indoor installations, adding $10,000–$30,000 per kilometer for installation in complex terrains .Core Count: Higher strand counts increase the per-kilometer cost proportionally; a 1-core fiber is cheaper than a 24- or 288-core cable .Market Volatility: Global supply-demand imbalances, geopolitical events, and urgent project requirements can cause daily price fluctuations .Protective Features: Armored or specialty fibers designed for harsh environments cost more than standard bare fibers .SummaryFor budgeting purposes, a reasonable estimate for a single-core, single-mode fiber per kilometer is $5–$10, with specialty fibers like G657A2 trending toward the higher end. Installation costs, terrain, and project-specific requirements can significantly increase the total per-kilometer cost, sometimes exceeding $30,000 per kilometer for fully deployed networks . Careful planning, bulk procurement, and leveraging existing infrastructure can help reduce overall costs while ensuring network reliability.