Background Anaemia affects an estimated 1·92 billion people worldwide. The UN Sustainable Development Goals set targets for reducing anaemia prevalence by 50% in women of reproductive age, for whom the risks and consequences of anaemia are the greatest. Prioritisation of cost-effective anaemia reduction strategies relies on robust estimates of the costs of interventions. We aimed to develop country-specific unit cost estimates for WHO-recommended anaemia interventions for women of reproductive age.